---
_id: '65574'
article_number: '052413'
author:
- first_name: Julien
full_name: Pinske, Julien
last_name: Pinske
- first_name: Jan
full_name: Sperling, Jan
id: '75127'
last_name: Sperling
orcid: 0000-0002-5844-3205
- first_name: Klaus
full_name: Mølmer, Klaus
last_name: Mølmer
citation:
ama: Pinske J, Sperling J, Mølmer K. Entangling power of nonentangling channels.
Physical Review A. 2026;113(5). doi:10.1103/vy93-dnc8
apa: Pinske, J., Sperling, J., & Mølmer, K. (2026). Entangling power of nonentangling
channels. Physical Review A, 113(5), Article 052413. https://doi.org/10.1103/vy93-dnc8
bibtex: '@article{Pinske_Sperling_Mølmer_2026, title={Entangling power of nonentangling
channels}, volume={113}, DOI={10.1103/vy93-dnc8},
number={5052413}, journal={Physical Review A}, publisher={American Physical Society
(APS)}, author={Pinske, Julien and Sperling, Jan and Mølmer, Klaus}, year={2026}
}'
chicago: Pinske, Julien, Jan Sperling, and Klaus Mølmer. “Entangling Power of Nonentangling
Channels.” Physical Review A 113, no. 5 (2026). https://doi.org/10.1103/vy93-dnc8.
ieee: 'J. Pinske, J. Sperling, and K. Mølmer, “Entangling power of nonentangling
channels,” Physical Review A, vol. 113, no. 5, Art. no. 052413, 2026, doi:
10.1103/vy93-dnc8.'
mla: Pinske, Julien, et al. “Entangling Power of Nonentangling Channels.” Physical
Review A, vol. 113, no. 5, 052413, American Physical Society (APS), 2026,
doi:10.1103/vy93-dnc8.
short: J. Pinske, J. Sperling, K. Mølmer, Physical Review A 113 (2026).
date_created: 2026-05-07T06:57:10Z
date_updated: 2026-05-07T06:58:39Z
department:
- _id: '623'
- _id: '15'
- _id: '170'
- _id: '706'
- _id: '429'
doi: 10.1103/vy93-dnc8
intvolume: ' 113'
issue: '5'
language:
- iso: eng
publication: Physical Review A
publication_identifier:
issn:
- 2469-9926
- 2469-9934
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Entangling power of nonentangling channels
type: journal_article
user_id: '75127'
volume: 113
year: '2026'
...
---
_id: '65521'
abstract:
- lang: eng
text: We present recent progress made towards ultra-broadband photonically assisted
analog-to-digital converters, that leverage both the low jitter of best-of-class
mode-locked lasers as well as the capability of optics to break down broadband
signals into multiple lower speed tributaries that can be better handled by electronics.
We review in particular our work on both time- and frequency-domain approaches
and give an outlook on how these architectures can be extended to include further
signal processing tasks such as equalization. Optically triggered track-and-hold
amplifiers are reported with an equivalent jitter below 80 fs rms in a signal
frequency range from 20 GHz to 70 GHz. Frequency-domain architectures implementing
optical arbitrary waveform measurement up to signal bandwidths of 610 GHz are
also shown. Finally, an architecture allowing the deserialization and equalization
of PAM4 signals is introduced and modeled for operation in 400 Gb/s links.
author:
- first_name: Jeremy
full_name: Witzens, Jeremy
last_name: Witzens
- first_name: Daniel
full_name: Drayss, Daniel
last_name: Drayss
- first_name: Dengyang
full_name: Fang, Dengyang
last_name: Fang
- first_name: Alvaro
full_name: Moscoso Mártir, Alvaro
last_name: Moscoso Mártir
- first_name: Juliana
full_name: Müller, Juliana
last_name: Müller
- first_name: Maxim
full_name: Weizel, Maxim
id: '44271'
last_name: Weizel
orcid: 0000-0003-2699-9839
- first_name: Andrea
full_name: Zazzi, Andrea
last_name: Zazzi
- first_name: Wolfgang
full_name: Freude, Wolfgang
last_name: Freude
- first_name: Christian
full_name: Koos, Christian
last_name: Koos
- first_name: Sebastian
full_name: Randel, Sebastian
last_name: Randel
- first_name: J. Christoph
full_name: Scheytt, J. Christoph
id: '37144'
last_name: Scheytt
orcid: '0000-0002-5950-6618 '
citation:
ama: 'Witzens J, Drayss D, Fang D, et al. Ultra-Broadband Photonically Assisted
Analog-to-Digital-Converters. In: Scheytt JC, Kress C, Berroth M, Pachnicke S,
Witzens J, eds. Electronic-Photonic Integrated Systems for Ultrafast Signal
Processing. Springer Nature Switzerland; 2026. doi:10.1007/978-3-032-08340-1_3'
apa: Witzens, J., Drayss, D., Fang, D., Moscoso Mártir, A., Müller, J., Weizel,
M., Zazzi, A., Freude, W., Koos, C., Randel, S., & Scheytt, J. C. (2026).
Ultra-Broadband Photonically Assisted Analog-to-Digital-Converters. In J. C. Scheytt,
C. Kress, M. Berroth, S. Pachnicke, & J. Witzens (Eds.), Electronic-Photonic
Integrated Systems for Ultrafast Signal Processing. Springer Nature Switzerland.
https://doi.org/10.1007/978-3-032-08340-1_3
bibtex: '@inbook{Witzens_Drayss_Fang_Moscoso Mártir_Müller_Weizel_Zazzi_Freude_Koos_Randel_et
al._2026, place={Cham}, title={Ultra-Broadband Photonically Assisted Analog-to-Digital-Converters},
DOI={10.1007/978-3-032-08340-1_3},
booktitle={Electronic-Photonic Integrated Systems for Ultrafast Signal Processing},
publisher={Springer Nature Switzerland}, author={Witzens, Jeremy and Drayss, Daniel
and Fang, Dengyang and Moscoso Mártir, Alvaro and Müller, Juliana and Weizel,
Maxim and Zazzi, Andrea and Freude, Wolfgang and Koos, Christian and Randel, Sebastian
and et al.}, editor={Scheytt, J. Christoph and Kress, Christian and Berroth, Manfred
and Pachnicke, Stephan and Witzens, Jeremy}, year={2026} }'
chicago: 'Witzens, Jeremy, Daniel Drayss, Dengyang Fang, Alvaro Moscoso Mártir,
Juliana Müller, Maxim Weizel, Andrea Zazzi, et al. “Ultra-Broadband Photonically
Assisted Analog-to-Digital-Converters.” In Electronic-Photonic Integrated Systems
for Ultrafast Signal Processing, edited by J. Christoph Scheytt, Christian
Kress, Manfred Berroth, Stephan Pachnicke, and Jeremy Witzens. Cham: Springer
Nature Switzerland, 2026. https://doi.org/10.1007/978-3-032-08340-1_3.'
ieee: 'J. Witzens et al., “Ultra-Broadband Photonically Assisted Analog-to-Digital-Converters,”
in Electronic-Photonic Integrated Systems for Ultrafast Signal Processing,
J. C. Scheytt, C. Kress, M. Berroth, S. Pachnicke, and J. Witzens, Eds. Cham:
Springer Nature Switzerland, 2026.'
mla: Witzens, Jeremy, et al. “Ultra-Broadband Photonically Assisted Analog-to-Digital-Converters.”
Electronic-Photonic Integrated Systems for Ultrafast Signal Processing,
edited by J. Christoph Scheytt et al., Springer Nature Switzerland, 2026, doi:10.1007/978-3-032-08340-1_3.
short: 'J. Witzens, D. Drayss, D. Fang, A. Moscoso Mártir, J. Müller, M. Weizel,
A. Zazzi, W. Freude, C. Koos, S. Randel, J.C. Scheytt, in: J.C. Scheytt, C. Kress,
M. Berroth, S. Pachnicke, J. Witzens (Eds.), Electronic-Photonic Integrated Systems
for Ultrafast Signal Processing, Springer Nature Switzerland, Cham, 2026.'
date_created: 2026-04-30T06:07:38Z
date_updated: 2026-05-11T07:56:04Z
department:
- _id: '58'
- _id: '623'
doi: 10.1007/978-3-032-08340-1_3
editor:
- first_name: J. Christoph
full_name: Scheytt, J. Christoph
last_name: Scheytt
- first_name: Christian
full_name: Kress, Christian
last_name: Kress
- first_name: Manfred
full_name: Berroth, Manfred
last_name: Berroth
- first_name: Stephan
full_name: Pachnicke, Stephan
last_name: Pachnicke
- first_name: Jeremy
full_name: Witzens, Jeremy
last_name: Witzens
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://link.springer.com/content/pdf/10.1007/978-3-032-08340-1.pdf
oa: '1'
place: Cham
project:
- _id: '303'
name: 'SPP 2111; TP: Ultrabreitbandiger Photonisch-Elektronischer Analog-Digital-Wandler
(PACE) - Phase 2'
publication: Electronic-Photonic Integrated Systems for Ultrafast Signal Processing
publication_identifier:
isbn:
- '9783032083395'
- '9783032083401'
publication_status: published
publisher: Springer Nature Switzerland
status: public
title: Ultra-Broadband Photonically Assisted Analog-to-Digital-Converters
type: book_chapter
user_id: '44271'
year: '2026'
...
---
_id: '57866'
abstract:
- lang: eng
text: "The theory of Total Function NP (TFNP) and its subclasses says that, even
if\r\none is promised an efficiently verifiable proof exists for a problem, finding\r\nthis
proof can be intractable. Despite the success of the theory at showing\r\nintractability
of problems such as computing Brouwer fixed points and Nash\r\nequilibria, subclasses
of TFNP remain arguably few and far between. In this\r\nwork, we define two new
subclasses of TFNP borne of the study of complex\r\npolynomial systems: Multi-homogeneous
Systems (MHS) and Sparse Fundamental\r\nTheorem of Algebra (SFTA). The first of
these is based on B\\'ezout's theorem\r\nfrom algebraic geometry, marking the
first TFNP subclass based on an algebraic\r\ngeometric principle. At the heart
of our study is the computational problem\r\nknown as Quantum SAT (QSAT) with
a System of Distinct Representatives (SDR),\r\nfirst studied by [Laumann, L\\\"auchli,
Moessner, Scardicchio, and Sondhi 2010].\r\nAmong other results, we show that
QSAT with SDR is MHS-complete, thus giving\r\nnot only the first link between
quantum complexity theory and TFNP, but also\r\nthe first TFNP problem whose classical
variant (SAT with SDR) is easy but whose\r\nquantum variant is hard. We also show
how to embed the roots of a sparse,\r\nhigh-degree, univariate polynomial into
QSAT with SDR, obtaining that SFTA is\r\ncontained in a zero-error version of
MHS. We conjecture this construction also\r\nworks in the low-error setting, which
would imply SFTA is contained in MHS."
author:
- first_name: Marco
full_name: Aldi, Marco
last_name: Aldi
- first_name: Sevag
full_name: Gharibian, Sevag
id: '71541'
last_name: Gharibian
orcid: 0000-0002-9992-3379
- first_name: Dorian
full_name: Rudolph, Dorian
id: '57863'
last_name: Rudolph
citation:
ama: 'Aldi M, Gharibian S, Rudolph D. An unholy trinity: TFNP, polynomial systems,
and the quantum satisfiability problem. In: 17th Innovations in Theoretical
Computer Science Conference (ITCS 2026). Vol 362. ; 2026:7:1-7:24.'
apa: 'Aldi, M., Gharibian, S., & Rudolph, D. (2026). An unholy trinity: TFNP,
polynomial systems, and the quantum satisfiability problem. 17th Innovations
in Theoretical Computer Science Conference (ITCS 2026), 362, 7:1-7:24.'
bibtex: '@inproceedings{Aldi_Gharibian_Rudolph_2026, title={An unholy trinity: TFNP,
polynomial systems, and the quantum satisfiability problem}, volume={362}, booktitle={17th
Innovations in Theoretical Computer Science Conference (ITCS 2026)}, author={Aldi,
Marco and Gharibian, Sevag and Rudolph, Dorian}, year={2026}, pages={7:1-7:24}
}'
chicago: 'Aldi, Marco, Sevag Gharibian, and Dorian Rudolph. “An Unholy Trinity:
TFNP, Polynomial Systems, and the Quantum Satisfiability Problem.” In 17th
Innovations in Theoretical Computer Science Conference (ITCS 2026), 362:7:1-7:24,
2026.'
ieee: 'M. Aldi, S. Gharibian, and D. Rudolph, “An unholy trinity: TFNP, polynomial
systems, and the quantum satisfiability problem,” in 17th Innovations in Theoretical
Computer Science Conference (ITCS 2026), 2026, vol. 362, p. 7:1-7:24.'
mla: 'Aldi, Marco, et al. “An Unholy Trinity: TFNP, Polynomial Systems, and the
Quantum Satisfiability Problem.” 17th Innovations in Theoretical Computer
Science Conference (ITCS 2026), vol. 362, 2026, p. 7:1-7:24.'
short: 'M. Aldi, S. Gharibian, D. Rudolph, in: 17th Innovations in Theoretical Computer
Science Conference (ITCS 2026), 2026, p. 7:1-7:24.'
date_created: 2024-12-30T13:55:27Z
date_updated: 2026-05-15T08:40:28Z
department:
- _id: '7'
- _id: '623'
external_id:
arxiv:
- '2412.19623'
intvolume: ' 362'
language:
- iso: eng
page: 7:1-7:24
publication: 17th Innovations in Theoretical Computer Science Conference (ITCS 2026)
publication_status: published
status: public
title: 'An unholy trinity: TFNP, polynomial systems, and the quantum satisfiability
problem'
type: conference
user_id: '71541'
volume: 362
year: '2026'
...
---
_id: '65655'
abstract:
- lang: eng
text: A functionalization-free plasmonic nanogap platform enables reliable on-site
SERS based oxidation-state differentiation of arsenic through uniform metal-vacuum-metal
cavities with high electromagnetic enhancement and minimal background interference.
article_type: original
author:
- first_name: Minjun
full_name: Kim, Minjun
last_name: Kim
- first_name: Damun
full_name: Heo, Damun
last_name: Heo
- first_name: Sung Yoon
full_name: Cho, Sung Yoon
last_name: Cho
- first_name: Ye-Won
full_name: Lee, Ye-Won
last_name: Lee
- first_name: Sun-Hwa
full_name: Gu, Sun-Hwa
last_name: Gu
- first_name: Samir
full_name: Adhikari, Samir
last_name: Adhikari
- first_name: Donghan
full_name: Lee, Donghan
last_name: Lee
- first_name: Seok Soon
full_name: Jeong, Seok Soon
last_name: Jeong
- first_name: Hyuck Soo
full_name: Kim, Hyuck Soo
last_name: Kim
- first_name: Vasanthan
full_name: Devaraj, Vasanthan
last_name: Devaraj
- first_name: Thomas
full_name: Zentgraf, Thomas
id: '30525'
last_name: Zentgraf
orcid: 0000-0002-8662-1101
- first_name: Min Yong
full_name: Jeon, Min Yong
last_name: Jeon
- first_name: Jong-Min
full_name: Lee, Jong-Min
last_name: Lee
citation:
ama: Kim M, Heo D, Cho SY, et al. A functionalization-free plasmonic hole-sphere
nanogap SERS platform for reliable on-site analysis and oxide-state classification.
Nanoscale. 2026;18(8):4292-4299. doi:10.1039/d5nr03414k
apa: Kim, M., Heo, D., Cho, S. Y., Lee, Y.-W., Gu, S.-H., Adhikari, S., Lee, D.,
Jeong, S. S., Kim, H. S., Devaraj, V., Zentgraf, T., Jeon, M. Y., & Lee, J.-M.
(2026). A functionalization-free plasmonic hole-sphere nanogap SERS platform for
reliable on-site analysis and oxide-state classification. Nanoscale, 18(8),
4292–4299. https://doi.org/10.1039/d5nr03414k
bibtex: '@article{Kim_Heo_Cho_Lee_Gu_Adhikari_Lee_Jeong_Kim_Devaraj_et al._2026,
title={A functionalization-free plasmonic hole-sphere nanogap SERS platform for
reliable on-site analysis and oxide-state classification}, volume={18}, DOI={10.1039/d5nr03414k}, number={8},
journal={Nanoscale}, publisher={Royal Society of Chemistry (RSC)}, author={Kim,
Minjun and Heo, Damun and Cho, Sung Yoon and Lee, Ye-Won and Gu, Sun-Hwa and Adhikari,
Samir and Lee, Donghan and Jeong, Seok Soon and Kim, Hyuck Soo and Devaraj, Vasanthan
and et al.}, year={2026}, pages={4292–4299} }'
chicago: 'Kim, Minjun, Damun Heo, Sung Yoon Cho, Ye-Won Lee, Sun-Hwa Gu, Samir Adhikari,
Donghan Lee, et al. “A Functionalization-Free Plasmonic Hole-Sphere Nanogap SERS
Platform for Reliable on-Site Analysis and Oxide-State Classification.” Nanoscale
18, no. 8 (2026): 4292–99. https://doi.org/10.1039/d5nr03414k.'
ieee: 'M. Kim et al., “A functionalization-free plasmonic hole-sphere nanogap
SERS platform for reliable on-site analysis and oxide-state classification,” Nanoscale,
vol. 18, no. 8, pp. 4292–4299, 2026, doi: 10.1039/d5nr03414k.'
mla: Kim, Minjun, et al. “A Functionalization-Free Plasmonic Hole-Sphere Nanogap
SERS Platform for Reliable on-Site Analysis and Oxide-State Classification.” Nanoscale,
vol. 18, no. 8, Royal Society of Chemistry (RSC), 2026, pp. 4292–99, doi:10.1039/d5nr03414k.
short: M. Kim, D. Heo, S.Y. Cho, Y.-W. Lee, S.-H. Gu, S. Adhikari, D. Lee, S.S.
Jeong, H.S. Kim, V. Devaraj, T. Zentgraf, M.Y. Jeon, J.-M. Lee, Nanoscale 18 (2026)
4292–4299.
date_created: 2026-05-20T06:53:30Z
date_updated: 2026-05-20T06:55:49Z
department:
- _id: '15'
- _id: '230'
- _id: '289'
- _id: '623'
doi: 10.1039/d5nr03414k
intvolume: ' 18'
issue: '8'
language:
- iso: eng
main_file_link:
- url: https://pubs.rsc.org/en/content/articlelanding/2026/nr/d5nr03414k
page: 4292-4299
publication: Nanoscale
publication_identifier:
issn:
- 2040-3364
- 2040-3372
publication_status: published
publisher: Royal Society of Chemistry (RSC)
quality_controlled: '1'
status: public
title: A functionalization-free plasmonic hole-sphere nanogap SERS platform for reliable
on-site analysis and oxide-state classification
type: journal_article
user_id: '30525'
volume: 18
year: '2026'
...
---
_id: '65749'
abstract:
- lang: eng
text: "Abstract\r\n Phase noise
is one of the most important properties of oscillators that limit the capacity
of high-frequency communication systems. In heterodyne conversion schemes, the
phase noise of the local oscillator will be multiplied and up-converted to the
transmission channel. Therefore, accurate characterization of the oscillators
is highly important for the design of THz communication systems. Especially when
it comes to the characterization of high-quality oscillators with extremely low
phase noise, traceable measurement methods are not available.\r\n In
this chapter, the mathematical model and definition of the amplitude noise (AM
noise) and phase noise (PM noise) are given. Different phase noise definition
standards such as single sideband (SSB) and double sideband will also be provided.
Phase noise measurement techniques such as frequency discrimination and phase-locked
loop (PLL) technique will be discussed. The standard two-channel cross correlation
for statistical analysis of phase noise at levels below the detection limit of
the phase noise receiver will be explained with mathematical formalism."
author:
- first_name: Meysam
full_name: Bahmanian, Meysam
id: '69233'
last_name: Bahmanian
- first_name: J. Christoph
full_name: Scheytt, J. Christoph
id: '37144'
last_name: Scheytt
orcid: '0000-0002-5950-6618 '
- first_name: Nora
full_name: Meyne, Nora
last_name: Meyne
- first_name: Thomas
full_name: Kleine-Ostmann, Thomas
last_name: Kleine-Ostmann
citation:
ama: 'Bahmanian M, Scheytt JC, Meyne N, Kleine-Ostmann T. Phase Noise Metrology.
In: Springer Series in Optical Sciences. Springer Nature Switzerland; 2026.
doi:10.1007/978-3-032-01986-8_4'
apa: Bahmanian, M., Scheytt, J. C., Meyne, N., & Kleine-Ostmann, T. (2026).
Phase Noise Metrology. In Springer Series in Optical Sciences. Springer
Nature Switzerland. https://doi.org/10.1007/978-3-032-01986-8_4
bibtex: '@inbook{Bahmanian_Scheytt_Meyne_Kleine-Ostmann_2026, place={Cham}, title={Phase
Noise Metrology}, DOI={10.1007/978-3-032-01986-8_4},
booktitle={Springer Series in Optical Sciences}, publisher={Springer Nature Switzerland},
author={Bahmanian, Meysam and Scheytt, J. Christoph and Meyne, Nora and Kleine-Ostmann,
Thomas}, year={2026} }'
chicago: 'Bahmanian, Meysam, J. Christoph Scheytt, Nora Meyne, and Thomas Kleine-Ostmann.
“Phase Noise Metrology.” In Springer Series in Optical Sciences. Cham:
Springer Nature Switzerland, 2026. https://doi.org/10.1007/978-3-032-01986-8_4.'
ieee: 'M. Bahmanian, J. C. Scheytt, N. Meyne, and T. Kleine-Ostmann, “Phase Noise
Metrology,” in Springer Series in Optical Sciences, Cham: Springer Nature
Switzerland, 2026.'
mla: Bahmanian, Meysam, et al. “Phase Noise Metrology.” Springer Series in Optical
Sciences, Springer Nature Switzerland, 2026, doi:10.1007/978-3-032-01986-8_4.
short: 'M. Bahmanian, J.C. Scheytt, N. Meyne, T. Kleine-Ostmann, in: Springer Series
in Optical Sciences, Springer Nature Switzerland, Cham, 2026.'
conference:
end_date: 2026-05-01
start_date: 2026-05-01
date_created: 2026-06-01T12:17:34Z
date_updated: 2026-06-02T09:34:24Z
department:
- _id: '58'
- _id: '623'
doi: 10.1007/978-3-032-01986-8_4
language:
- iso: eng
place: Cham
publication: Springer Series in Optical Sciences
publication_identifier:
isbn:
- '9783032019851'
- '9783032019868'
issn:
- 0342-4111
- 1556-1534
publication_status: published
publisher: Springer Nature Switzerland
status: public
title: Phase Noise Metrology
type: book_chapter
user_id: '13256'
year: '2026'
...
---
_id: '65748'
abstract:
- lang: eng
text: "Abstract\r\n In this chapter,
the precision of optical clocks based on mode-locked laser (MLL) is compared with
more conventional types of clock sources. It is shown that the phase noise of
the optical pulse train from the MLL can be better than other types of clock sources
by orders of magnitude. Then, an abstract representation of frequency synthesizer
is demonstrated. Different techniques for RF generation using MLL are shown, and
their pros and cons are discussed. Finally, a comparison of all these techniques
is made with respect to their phase noise and capability to generate RF signal
with different frequencies for different applications."
author:
- first_name: Meysam
full_name: Bahmanian, Meysam
id: '69233'
last_name: Bahmanian
- first_name: J. Christoph
full_name: Scheytt, J. Christoph
id: '37144'
last_name: Scheytt
orcid: '0000-0002-5950-6618 '
citation:
ama: 'Bahmanian M, Scheytt JC. Frequency Synthesis Based on MLLs. In: Springer
Series in Optical Sciences. Springer Nature Switzerland; 2026. doi:10.1007/978-3-032-01986-8_28'
apa: Bahmanian, M., & Scheytt, J. C. (2026). Frequency Synthesis Based on MLLs.
In Springer Series in Optical Sciences. Springer Nature Switzerland. https://doi.org/10.1007/978-3-032-01986-8_28
bibtex: '@inbook{Bahmanian_Scheytt_2026, place={Cham}, title={Frequency Synthesis
Based on MLLs}, DOI={10.1007/978-3-032-01986-8_28},
booktitle={Springer Series in Optical Sciences}, publisher={Springer Nature Switzerland},
author={Bahmanian, Meysam and Scheytt, J. Christoph}, year={2026} }'
chicago: 'Bahmanian, Meysam, and J. Christoph Scheytt. “Frequency Synthesis Based
on MLLs.” In Springer Series in Optical Sciences. Cham: Springer Nature
Switzerland, 2026. https://doi.org/10.1007/978-3-032-01986-8_28.'
ieee: 'M. Bahmanian and J. C. Scheytt, “Frequency Synthesis Based on MLLs,” in Springer
Series in Optical Sciences, Cham: Springer Nature Switzerland, 2026.'
mla: Bahmanian, Meysam, and J. Christoph Scheytt. “Frequency Synthesis Based on
MLLs.” Springer Series in Optical Sciences, Springer Nature Switzerland,
2026, doi:10.1007/978-3-032-01986-8_28.
short: 'M. Bahmanian, J.C. Scheytt, in: Springer Series in Optical Sciences, Springer
Nature Switzerland, Cham, 2026.'
conference:
end_date: 2026-05-01
start_date: 2026-05-01
date_created: 2026-06-01T12:16:46Z
date_updated: 2026-06-02T09:34:54Z
department:
- _id: '58'
- _id: '623'
doi: 10.1007/978-3-032-01986-8_28
language:
- iso: eng
place: Cham
publication: Springer Series in Optical Sciences
publication_identifier:
isbn:
- '9783032019851'
- '9783032019868'
issn:
- 0342-4111
- 1556-1534
publication_status: published
publisher: Springer Nature Switzerland
status: public
title: Frequency Synthesis Based on MLLs
type: book_chapter
user_id: '13256'
year: '2026'
...
---
_id: '65777'
abstract:
- lang: eng
text: "Abstract\r\n In this work,
we address the numerical identification of entanglement in dynamical scenarios.
To this end, we consider different programs based on the restriction of the evolution
to the set of separable (i.e., non-entangled) states, together with the discretization
of the space of variables for numerical computations. As a first approach, we
apply linear splitting methods to the restricted, continuous equations of motion
derived from variational principles. We utilize an exchange interaction Hamiltonian
to confirm that the numerical and analytical solutions coincide in the limit of
small time steps. The application to different Hamiltonians shows the wide applicability
of the method to detect dynamical entanglement. To avoid the derivation of analytical
solutions for complex dynamics, we consider variational, numerical integration
schemes, introducing a variational discretization for Lagrangians linear in velocities.
Here, we examine and compare two approaches: one in which the system is discretized
before the restriction is applied, and another in which the restriction precedes
the discretization. We find that the ‘first-discretize-then-restrict’ method becomes
numerically unstable, already for the example of an exchange-interaction Hamiltonian,
which can be an important consideration for the numerical analysis of constrained
quantum dynamics. Thereby, broadly applicable numerical tools, including their
limitations, for studying entanglement over time are established for assessing
the entangling power of processes that are used in quantum information theory."
article_number: '225303'
author:
- first_name: Christian
full_name: Offen, Christian
last_name: Offen
- first_name: Boris Edgar
full_name: Wembe Moafo, Boris Edgar
id: '95394'
last_name: Wembe Moafo
orcid: 0000-0002-6085-8071
- first_name: Laura
full_name: Ares, Laura
last_name: Ares
- first_name: Jan
full_name: Sperling, Jan
id: '75127'
last_name: Sperling
orcid: 0000-0002-5844-3205
- first_name: Sina
full_name: Ober-Blöbaum, Sina
id: '16494'
last_name: Ober-Blöbaum
citation:
ama: 'Offen C, Wembe Moafo BE, Ares L, Sperling J, Ober-Blöbaum S. Numerical approaches
to entangling dynamics from variational principles. Journal of Physics A: Mathematical
and Theoretical. 2026;59(22). doi:10.1088/1751-8121/ae6d51'
apa: 'Offen, C., Wembe Moafo, B. E., Ares, L., Sperling, J., & Ober-Blöbaum,
S. (2026). Numerical approaches to entangling dynamics from variational principles.
Journal of Physics A: Mathematical and Theoretical, 59(22), Article
225303. https://doi.org/10.1088/1751-8121/ae6d51'
bibtex: '@article{Offen_Wembe Moafo_Ares_Sperling_Ober-Blöbaum_2026, title={Numerical
approaches to entangling dynamics from variational principles}, volume={59}, DOI={10.1088/1751-8121/ae6d51},
number={22225303}, journal={Journal of Physics A: Mathematical and Theoretical},
publisher={IOP Publishing}, author={Offen, Christian and Wembe Moafo, Boris Edgar
and Ares, Laura and Sperling, Jan and Ober-Blöbaum, Sina}, year={2026} }'
chicago: 'Offen, Christian, Boris Edgar Wembe Moafo, Laura Ares, Jan Sperling, and
Sina Ober-Blöbaum. “Numerical Approaches to Entangling Dynamics from Variational
Principles.” Journal of Physics A: Mathematical and Theoretical 59, no.
22 (2026). https://doi.org/10.1088/1751-8121/ae6d51.'
ieee: 'C. Offen, B. E. Wembe Moafo, L. Ares, J. Sperling, and S. Ober-Blöbaum, “Numerical
approaches to entangling dynamics from variational principles,” Journal of
Physics A: Mathematical and Theoretical, vol. 59, no. 22, Art. no. 225303,
2026, doi: 10.1088/1751-8121/ae6d51.'
mla: 'Offen, Christian, et al. “Numerical Approaches to Entangling Dynamics from
Variational Principles.” Journal of Physics A: Mathematical and Theoretical,
vol. 59, no. 22, 225303, IOP Publishing, 2026, doi:10.1088/1751-8121/ae6d51.'
short: 'C. Offen, B.E. Wembe Moafo, L. Ares, J. Sperling, S. Ober-Blöbaum, Journal
of Physics A: Mathematical and Theoretical 59 (2026).'
date_created: 2026-06-05T07:37:43Z
date_updated: 2026-06-05T07:38:44Z
department:
- _id: '623'
- _id: '15'
- _id: '170'
- _id: '706'
- _id: '429'
doi: 10.1088/1751-8121/ae6d51
intvolume: ' 59'
issue: '22'
language:
- iso: eng
publication: 'Journal of Physics A: Mathematical and Theoretical'
publication_identifier:
issn:
- 1751-8113
- 1751-8121
publication_status: published
publisher: IOP Publishing
status: public
title: Numerical approaches to entangling dynamics from variational principles
type: journal_article
user_id: '75127'
volume: 59
year: '2026'
...
---
_id: '65847'
abstract:
- lang: eng
text: Simulating vibronic spectra is a central task in physical chemistry, offering
insight into important properties of molecules. Recently, it has been experimentally
demonstrated that photonic platforms based on Gaussian boson sampling (GBS) are
capable of performing these simulations. However, whether an actual GBS approach
is required depends on the molecule under investigation. To develop a better understanding
on the requirements for simulating vibronic spectra, we explore connections between
theoretical approximations in physical chemistry and their photonic counterparts.
Mapping these approximations into photonics, we show that for certain molecules
the GBS approach is unnecessary. We place special emphasis on the linear coupling
approximation, which in photonics corresponds to sampling from multiple coherent
states. By implementing this approach in experiments, we demonstrate improved
similarities over previously reported GBS results for formic acid and identify
the particular attributes that a molecule must exhibit for this, and other approximations,
to be valid. These results highlight the importance in forming deeper connections
between traditional methods and photonic approaches.
article_number: '89'
article_type: original
author:
- first_name: Jan-Lucas
full_name: Eickmann, Jan-Lucas
id: '73665'
last_name: Eickmann
orcid: 0009-0008-6524-7684
- first_name: Kai-Hong
full_name: Luo, Kai-Hong
id: '36389'
last_name: Luo
orcid: 0000-0003-1008-4976
- first_name: Mikhail
full_name: Roiz, Mikhail
id: '114114'
last_name: Roiz
- first_name: Jonas
full_name: Lammers, Jonas
last_name: Lammers
- first_name: Simone
full_name: Atzeni, Simone
id: '98338'
last_name: Atzeni
- first_name: Cheeranjiv
full_name: Pandey, Cheeranjiv
last_name: Pandey
- first_name: Florian
full_name: Lütkewitte, Florian
last_name: Lütkewitte
- first_name: Reza G.
full_name: Shirazi, Reza G.
last_name: Shirazi
- first_name: Fabian
full_name: Schlue, Fabian
id: '63579'
last_name: Schlue
- first_name: Benjamin
full_name: Brecht, Benjamin
id: '27150'
last_name: Brecht
orcid: '0000-0003-4140-0556 '
- first_name: Vladimir V.
full_name: Rybkin, Vladimir V.
last_name: Rybkin
- first_name: Michael
full_name: Stefszky, Michael
id: '42777'
last_name: Stefszky
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
citation:
ama: 'Eickmann J-L, Luo K-H, Roiz M, et al. Bridging chemistry and Gaussian boson
sampling: a photonic hierarchy of approximations for molecular vibronic spectra.
npj Quantum Information. 2026;12(1). doi:10.1038/s41534-026-01250-x'
apa: 'Eickmann, J.-L., Luo, K.-H., Roiz, M., Lammers, J., Atzeni, S., Pandey, C.,
Lütkewitte, F., Shirazi, R. G., Schlue, F., Brecht, B., Rybkin, V. V., Stefszky,
M., & Silberhorn, C. (2026). Bridging chemistry and Gaussian boson sampling:
a photonic hierarchy of approximations for molecular vibronic spectra. Npj
Quantum Information, 12(1), Article 89. https://doi.org/10.1038/s41534-026-01250-x'
bibtex: '@article{Eickmann_Luo_Roiz_Lammers_Atzeni_Pandey_Lütkewitte_Shirazi_Schlue_Brecht_et
al._2026, title={Bridging chemistry and Gaussian boson sampling: a photonic hierarchy
of approximations for molecular vibronic spectra}, volume={12}, DOI={10.1038/s41534-026-01250-x},
number={189}, journal={npj Quantum Information}, publisher={Springer Science and
Business Media LLC}, author={Eickmann, Jan-Lucas and Luo, Kai-Hong and Roiz, Mikhail
and Lammers, Jonas and Atzeni, Simone and Pandey, Cheeranjiv and Lütkewitte, Florian
and Shirazi, Reza G. and Schlue, Fabian and Brecht, Benjamin and et al.}, year={2026}
}'
chicago: 'Eickmann, Jan-Lucas, Kai-Hong Luo, Mikhail Roiz, Jonas Lammers, Simone
Atzeni, Cheeranjiv Pandey, Florian Lütkewitte, et al. “Bridging Chemistry and
Gaussian Boson Sampling: A Photonic Hierarchy of Approximations for Molecular
Vibronic Spectra.” Npj Quantum Information 12, no. 1 (2026). https://doi.org/10.1038/s41534-026-01250-x.'
ieee: 'J.-L. Eickmann et al., “Bridging chemistry and Gaussian boson sampling:
a photonic hierarchy of approximations for molecular vibronic spectra,” npj
Quantum Information, vol. 12, no. 1, Art. no. 89, 2026, doi: 10.1038/s41534-026-01250-x.'
mla: 'Eickmann, Jan-Lucas, et al. “Bridging Chemistry and Gaussian Boson Sampling:
A Photonic Hierarchy of Approximations for Molecular Vibronic Spectra.” Npj
Quantum Information, vol. 12, no. 1, 89, Springer Science and Business Media
LLC, 2026, doi:10.1038/s41534-026-01250-x.'
short: J.-L. Eickmann, K.-H. Luo, M. Roiz, J. Lammers, S. Atzeni, C. Pandey, F.
Lütkewitte, R.G. Shirazi, F. Schlue, B. Brecht, V.V. Rybkin, M. Stefszky, C. Silberhorn,
Npj Quantum Information 12 (2026).
date_created: 2026-06-12T08:14:35Z
date_updated: 2026-06-12T08:28:02Z
department:
- _id: '288'
- _id: '623'
- _id: '15'
doi: 10.1038/s41534-026-01250-x
intvolume: ' 12'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.nature.com/articles/s41534-026-01250-x.pdf
oa: '1'
project:
- _id: '191'
name: 'PhoQuant: Photonische Quantencomputer - Quantencomputing Testplattform'
publication: npj Quantum Information
publication_identifier:
issn:
- 2056-6387
publication_status: published
publisher: Springer Science and Business Media LLC
related_material:
link:
- relation: research_data
url: https://doi.org/10.5281/zenodo.18969354
status: public
title: 'Bridging chemistry and Gaussian boson sampling: a photonic hierarchy of approximations
for molecular vibronic spectra'
type: journal_article
user_id: '73665'
volume: 12
year: '2026'
...
---
_id: '65906'
article_number: '1407507'
author:
- first_name: Xiao
full_name: Jin, Xiao
last_name: Jin
- first_name: Thomas
full_name: Zentgraf, Thomas
id: '30525'
last_name: Zentgraf
orcid: 0000-0002-8662-1101
citation:
ama: 'Jin X, Zentgraf T. OAM-multiplexed holography via cascaded metasurfaces without
post sampling and position multiplexing. In: MacDonald KF, Zayats AV, Staude I,
eds. Metamaterials XV. Vol 14075. SPIE; 2026. doi:10.1117/12.3096579'
apa: Jin, X., & Zentgraf, T. (2026). OAM-multiplexed holography via cascaded
metasurfaces without post sampling and position multiplexing. In K. F. MacDonald,
A. V. Zayats, & I. Staude (Eds.), Metamaterials XV (No. 1407507; Vol.
14075). SPIE. https://doi.org/10.1117/12.3096579
bibtex: '@inproceedings{Jin_Zentgraf_2026, title={OAM-multiplexed holography via
cascaded metasurfaces without post sampling and position multiplexing}, volume={14075},
DOI={10.1117/12.3096579}, number={1407507},
booktitle={Metamaterials XV}, publisher={SPIE}, author={Jin, Xiao and Zentgraf,
Thomas}, editor={MacDonald, Kevin F. and Zayats, Anatoly V. and Staude, Isabelle},
year={2026} }'
chicago: Jin, Xiao, and Thomas Zentgraf. “OAM-Multiplexed Holography via Cascaded
Metasurfaces without Post Sampling and Position Multiplexing.” In Metamaterials
XV, edited by Kevin F. MacDonald, Anatoly V. Zayats, and Isabelle Staude,
Vol. 14075. SPIE, 2026. https://doi.org/10.1117/12.3096579.
ieee: 'X. Jin and T. Zentgraf, “OAM-multiplexed holography via cascaded metasurfaces
without post sampling and position multiplexing,” in Metamaterials XV,
Strasbourg, France, 2026, vol. 14075, doi: 10.1117/12.3096579.'
mla: Jin, Xiao, and Thomas Zentgraf. “OAM-Multiplexed Holography via Cascaded Metasurfaces
without Post Sampling and Position Multiplexing.” Metamaterials XV, edited
by Kevin F. MacDonald et al., vol. 14075, 1407507, SPIE, 2026, doi:10.1117/12.3096579.
short: 'X. Jin, T. Zentgraf, in: K.F. MacDonald, A.V. Zayats, I. Staude (Eds.),
Metamaterials XV, SPIE, 2026.'
conference:
location: Strasbourg, France
name: SPIE Photonics Europe 2026
date_created: 2026-06-16T07:37:13Z
date_updated: 2026-06-16T07:40:15Z
department:
- _id: '15'
- _id: '230'
- _id: '289'
- _id: '623'
doi: 10.1117/12.3096579
editor:
- first_name: Kevin F.
full_name: MacDonald, Kevin F.
last_name: MacDonald
- first_name: Anatoly V.
full_name: Zayats, Anatoly V.
last_name: Zayats
- first_name: Isabelle
full_name: Staude, Isabelle
last_name: Staude
intvolume: ' 14075'
language:
- iso: eng
main_file_link:
- url: https://www.spiedigitallibrary.org/conference-proceedings-of-spie/14075/3096579/OAM-multiplexed-holography-via-cascaded-metasurfaces-without-post-sampling-and/10.1117/12.3096579.full
publication: Metamaterials XV
publication_status: published
publisher: SPIE
status: public
title: OAM-multiplexed holography via cascaded metasurfaces without post sampling
and position multiplexing
type: conference
user_id: '30525'
volume: 14075
year: '2026'
...
---
_id: '56950'
abstract:
- lang: eng
text: "After nearly two decades of research, the question of a quantum PCP theorem\r\nfor
quantum Constraint Satisfaction Problems (CSPs) remains wide open. As a\r\nresult,
proving QMA-hardness of approximation for ground state energy\r\nestimation has
remained elusive. Recently, it was shown [Bittel, Gharibian,\r\nKliesch, CCC 2023]
that a natural problem involving variational quantum\r\ncircuits is QCMA-hard
to approximate within ratio N^(1-eps) for any eps > 0 and\r\nN the input size.
Unfortunately, this problem was not related to quantum CSPs,\r\nleaving the question
of hardness of approximation for quantum CSPs open. In\r\nthis work, we show that
if instead of focusing on ground state energies, one\r\nconsiders computing properties
of the ground space, QCMA-hardness of computing\r\nground space properties can
be shown. In particular, we show that it is (1)\r\nQCMA-complete within ratio
N^(1-eps) to approximate the Ground State\r\nConnectivity problem (GSCON), and
(2) QCMA-hard within the same ratio to\r\nestimate the amount of entanglement
of a local Hamiltonian's ground state,\r\ndenoted Ground State Entanglement (GSE).
As a bonus, a simplification of our\r\nconstruction yields NP-completeness of
approximation for a natural k-SAT\r\nreconfiguration problem, to be contrasted
with the recent PCP-based PSPACE\r\nhardness of approximation results for a different
definition of k-SAT\r\nreconfiguration [Karthik C.S. and Manurangsi, 2023, and
Hirahara, Ohsaka, STOC\r\n2024]."
author:
- first_name: Sevag
full_name: Gharibian, Sevag
id: '71541'
last_name: Gharibian
orcid: 0000-0002-9992-3379
- first_name: Carsten
full_name: Hecht, Carsten
last_name: Hecht
citation:
ama: 'Gharibian S, Hecht C. Hardness of approximation for ground state problems.
In: 51st International Symposium on Mathematical Foundations of Computer Science
(MFCS).'
apa: Gharibian, S., & Hecht, C. (n.d.). Hardness of approximation for ground
state problems. 51st International Symposium on Mathematical Foundations of
Computer Science (MFCS).
bibtex: '@inproceedings{Gharibian_Hecht, title={Hardness of approximation for ground
state problems}, booktitle={51st International Symposium on Mathematical Foundations
of Computer Science (MFCS)}, author={Gharibian, Sevag and Hecht, Carsten} }'
chicago: Gharibian, Sevag, and Carsten Hecht. “Hardness of Approximation for Ground
State Problems.” In 51st International Symposium on Mathematical Foundations
of Computer Science (MFCS), n.d.
ieee: S. Gharibian and C. Hecht, “Hardness of approximation for ground state problems.”
mla: Gharibian, Sevag, and Carsten Hecht. “Hardness of Approximation for Ground
State Problems.” 51st International Symposium on Mathematical Foundations of
Computer Science (MFCS).
short: 'S. Gharibian, C. Hecht, in: 51st International Symposium on Mathematical
Foundations of Computer Science (MFCS), n.d.'
date_created: 2024-11-08T07:58:24Z
date_updated: 2026-06-19T08:01:13Z
department:
- _id: '7'
- _id: '623'
external_id:
arxiv:
- '2411.04874'
language:
- iso: eng
publication: 51st International Symposium on Mathematical Foundations of Computer
Science (MFCS)
publication_status: accepted
status: public
title: Hardness of approximation for ground state problems
type: conference
user_id: '71541'
year: '2026'
...
---
_id: '66555'
abstract:
- lang: eng
text: 'Scalable plasmonic technologies face a critical trade‐off: few‐body architectures
offer high enhancement but are sensitive to fabrication flaws, while scalable
methods like solid‐state dewetting yield large, low‐enhancement gaps. We introduce
a paradigm shift using a many‐body plasmonic architecture inspired by statistical
mechanics. By moving toward the continuum limit, local geometric variations are
statistically averaged out, effectively decoupling optical performance from microscopic
disorder. We implement this concept via a lithography‐ and etching‐free, multi‐step
dewetting strategy, creating wafer‐scale nanoclusters. This process strategically
forms a robust many‐body system by introducing numerous small satellite nanoparticles
between larger particles. Crucially, this design achieves a high collective enhancement
that surpasses even optimized few‐body systems, despite having larger individual
gaps. Under optimized conditions, these substrates exhibit a surface‐enhanced
Raman scattering enhancement factor approaching 4 × 10^8 with unprecedented reproducibility
(RSD of ∼10%). This scalable, low‐cost concept establishes a practical route toward
reproducible wafer‐scale nanophotonic platforms for sensing, spectroscopy, and
quantum technologies.'
article_number: e71610
article_type: original
author:
- first_name: Minjun
full_name: Kim, Minjun
last_name: Kim
- first_name: Vasanthan
full_name: Devaraj, Vasanthan
id: '103814'
last_name: Devaraj
- first_name: Hyeon‐Seok
full_name: Seo, Hyeon‐Seok
last_name: Seo
- first_name: Seong‐Jae
full_name: Eom, Seong‐Jae
last_name: Eom
- first_name: Jeong‐Su
full_name: Lee, Jeong‐Su
last_name: Lee
- first_name: Donghan
full_name: Lee, Donghan
last_name: Lee
- first_name: Min Yong
full_name: Jeon, Min Yong
last_name: Jeon
- first_name: Thomas
full_name: Zentgraf, Thomas
id: '30525'
last_name: Zentgraf
orcid: 0000-0002-8662-1101
- first_name: Jong‐Min
full_name: Lee, Jong‐Min
last_name: Lee
citation:
ama: Kim M, Devaraj V, Seo H, et al. Engineering Disordered Many‐Particle Plasmonic
Nanoclusters for Wafer‐Scale Uniform and Giant Electromagnetic Field Enhancement.
Laser & Photonics Reviews. Published online 2026. doi:10.1002/lpor.71610
apa: Kim, M., Devaraj, V., Seo, H., Eom, S., Lee, J., Lee, D., Jeon, M. Y., Zentgraf,
T., & Lee, J. (2026). Engineering Disordered Many‐Particle Plasmonic Nanoclusters
for Wafer‐Scale Uniform and Giant Electromagnetic Field Enhancement. Laser
& Photonics Reviews, Article e71610. https://doi.org/10.1002/lpor.71610
bibtex: '@article{Kim_Devaraj_Seo_Eom_Lee_Lee_Jeon_Zentgraf_Lee_2026, title={Engineering
Disordered Many‐Particle Plasmonic Nanoclusters for Wafer‐Scale Uniform and Giant
Electromagnetic Field Enhancement}, DOI={10.1002/lpor.71610},
number={e71610}, journal={Laser & Photonics Reviews}, publisher={Wiley},
author={Kim, Minjun and Devaraj, Vasanthan and Seo, Hyeon‐Seok and Eom, Seong‐Jae
and Lee, Jeong‐Su and Lee, Donghan and Jeon, Min Yong and Zentgraf, Thomas and
Lee, Jong‐Min}, year={2026} }'
chicago: Kim, Minjun, Vasanthan Devaraj, Hyeon‐Seok Seo, Seong‐Jae Eom, Jeong‐Su
Lee, Donghan Lee, Min Yong Jeon, Thomas Zentgraf, and Jong‐Min Lee. “Engineering
Disordered Many‐Particle Plasmonic Nanoclusters for Wafer‐Scale Uniform and Giant
Electromagnetic Field Enhancement.” Laser & Photonics Reviews,
2026. https://doi.org/10.1002/lpor.71610.
ieee: 'M. Kim et al., “Engineering Disordered Many‐Particle Plasmonic Nanoclusters
for Wafer‐Scale Uniform and Giant Electromagnetic Field Enhancement,” Laser
& Photonics Reviews, Art. no. e71610, 2026, doi: 10.1002/lpor.71610.'
mla: Kim, Minjun, et al. “Engineering Disordered Many‐Particle Plasmonic Nanoclusters
for Wafer‐Scale Uniform and Giant Electromagnetic Field Enhancement.” Laser
& Photonics Reviews, e71610, Wiley, 2026, doi:10.1002/lpor.71610.
short: M. Kim, V. Devaraj, H. Seo, S. Eom, J. Lee, D. Lee, M.Y. Jeon, T. Zentgraf,
J. Lee, Laser & Photonics Reviews (2026).
date_created: 2026-07-22T05:49:50Z
date_updated: 2026-07-22T05:52:38Z
department:
- _id: '15'
- _id: '230'
- _id: '289'
- _id: '623'
doi: 10.1002/lpor.71610
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://onlinelibrary.wiley.com/doi/10.1002/lpor.71610
oa: '1'
publication: Laser & Photonics Reviews
publication_identifier:
issn:
- 1863-8880
- 1863-8899
publication_status: published
publisher: Wiley
quality_controlled: '1'
status: public
title: Engineering Disordered Many‐Particle Plasmonic Nanoclusters for Wafer‐Scale
Uniform and Giant Electromagnetic Field Enhancement
type: journal_article
user_id: '30525'
year: '2026'
...
---
_id: '66583'
abstract:
- lang: eng
text: We introduce a method for determining the sensitivity of any given entangled
two-photon absorption (ETPA) measurement. By modeling all signal and noise contributions
to the measurement, we derive a single numerical value that describes the sensitivity
of the ETPA measurement in Göppert-Mayer units. This allows us to directly compare
vastly different experimental approaches and determine whether ETPA will be detectable
under the given conditions. Therefore we can quantify the effect of any change
to a given experimental apparatus and identify the ideal optimization pathway.
article_number: '013718'
article_type: original
author:
- first_name: René
full_name: Pollmann, René
id: '78890'
last_name: Pollmann
- first_name: Franz
full_name: Roeder, Franz
id: '88149'
last_name: Roeder
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
- first_name: Benjamin
full_name: Brecht, Benjamin
id: '27150'
last_name: Brecht
orcid: '0000-0003-4140-0556 '
citation:
ama: Pollmann R, Roeder F, Silberhorn C, Brecht B. Limitations of entangled two-photon
absorption detection. Physical Review A. 2026;114(1). doi:10.1103/qpb1-hk5l
apa: Pollmann, R., Roeder, F., Silberhorn, C., & Brecht, B. (2026). Limitations
of entangled two-photon absorption detection. Physical Review A, 114(1),
Article 013718. https://doi.org/10.1103/qpb1-hk5l
bibtex: '@article{Pollmann_Roeder_Silberhorn_Brecht_2026, title={Limitations of
entangled two-photon absorption detection}, volume={114}, DOI={10.1103/qpb1-hk5l},
number={1013718}, journal={Physical Review A}, publisher={American Physical Society
(APS)}, author={Pollmann, René and Roeder, Franz and Silberhorn, Christine and
Brecht, Benjamin}, year={2026} }'
chicago: Pollmann, René, Franz Roeder, Christine Silberhorn, and Benjamin Brecht.
“Limitations of Entangled Two-Photon Absorption Detection.” Physical Review
A 114, no. 1 (2026). https://doi.org/10.1103/qpb1-hk5l.
ieee: 'R. Pollmann, F. Roeder, C. Silberhorn, and B. Brecht, “Limitations of entangled
two-photon absorption detection,” Physical Review A, vol. 114, no. 1, Art.
no. 013718, 2026, doi: 10.1103/qpb1-hk5l.'
mla: Pollmann, René, et al. “Limitations of Entangled Two-Photon Absorption Detection.”
Physical Review A, vol. 114, no. 1, 013718, American Physical Society (APS),
2026, doi:10.1103/qpb1-hk5l.
short: R. Pollmann, F. Roeder, C. Silberhorn, B. Brecht, Physical Review A 114 (2026).
date_created: 2026-07-24T10:53:18Z
date_updated: 2026-07-24T11:00:08Z
department:
- _id: '623'
- _id: '15'
doi: 10.1103/qpb1-hk5l
intvolume: ' 114'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://journals.aps.org/pra/abstract/10.1103/qpb1-hk5l
oa: '1'
publication: Physical Review A
publication_identifier:
issn:
- 2469-9926
- 2469-9934
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Limitations of entangled two-photon absorption detection
type: journal_article
user_id: '78890'
volume: 114
year: '2026'
...
---
_id: '66640'
abstract:
- lang: eng
text: "\r\n We develop a framework for identifying nonclassical
speedups in systems with polarization, likewise spin degrees of freedom. By confining
the dynamics to the manifold of angular momentum coherent states, which act as
the classical reference in this case, we compute the speed limit that bounds the
rate of change of the state achievable without generating quantum coherence. A
comparison with the unrestricted quantum speed limit enables the quantitative
identification of speedups arising from polarization nonclassicality. We apply
this framework to the cross-Kerr interaction, demonstrating a persistent speedup
scaling as\r\n \r\n
\ \r\n O\r\n
\ (\r\n \r\n
\ N\r\n \r\n
\ )\r\n \r\n
\ \r\n with the photon number\r\n
\ \r\n
\ N\r\n \r\n ,
with a parity effect in favor of even photon numbers. The results establish polarization
nonclassicality as a genuine dynamical resource, linking quantum coherence to
quantum-enhanced evolution speeds in nonlinear photonic systems.\r\n "
article_number: L032018
author:
- first_name: Tim
full_name: Aßbrock, Tim
last_name: Aßbrock
- first_name: Jan
full_name: Sperling, Jan
id: '75127'
last_name: Sperling
orcid: 0000-0002-5844-3205
- first_name: Laura
full_name: Ares, Laura
last_name: Ares
citation:
ama: Aßbrock T, Sperling J, Ares L. Quantum speedup from nonclassical polarization.
Physical Review Research. 2026;8(3). doi:10.1103/mflc-2mzq
apa: Aßbrock, T., Sperling, J., & Ares, L. (2026). Quantum speedup from nonclassical
polarization. Physical Review Research, 8(3), Article L032018. https://doi.org/10.1103/mflc-2mzq
bibtex: '@article{Aßbrock_Sperling_Ares_2026, title={Quantum speedup from nonclassical
polarization}, volume={8}, DOI={10.1103/mflc-2mzq},
number={3L032018}, journal={Physical Review Research}, publisher={American Physical
Society (APS)}, author={Aßbrock, Tim and Sperling, Jan and Ares, Laura}, year={2026}
}'
chicago: Aßbrock, Tim, Jan Sperling, and Laura Ares. “Quantum Speedup from Nonclassical
Polarization.” Physical Review Research 8, no. 3 (2026). https://doi.org/10.1103/mflc-2mzq.
ieee: 'T. Aßbrock, J. Sperling, and L. Ares, “Quantum speedup from nonclassical
polarization,” Physical Review Research, vol. 8, no. 3, Art. no. L032018,
2026, doi: 10.1103/mflc-2mzq.'
mla: Aßbrock, Tim, et al. “Quantum Speedup from Nonclassical Polarization.” Physical
Review Research, vol. 8, no. 3, L032018, American Physical Society (APS),
2026, doi:10.1103/mflc-2mzq.
short: T. Aßbrock, J. Sperling, L. Ares, Physical Review Research 8 (2026).
date_created: 2026-08-03T16:26:49Z
date_updated: 2026-08-03T16:28:48Z
department:
- _id: '623'
- _id: '15'
- _id: '170'
- _id: '706'
doi: 10.1103/mflc-2mzq
intvolume: ' 8'
issue: '3'
language:
- iso: eng
publication: Physical Review Research
publication_identifier:
issn:
- 2643-1564
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Quantum speedup from nonclassical polarization
type: journal_article
user_id: '75127'
volume: 8
year: '2026'
...
---
_id: '66741'
abstract:
- lang: eng
text: "Abstract\r\n \r\n We
study theoretically how high-gain effects affect the measurement outcome of visible
signal spectra in undetected photon measurement schemes. We consider two interferometric
configurations: firstly, the SU(1,1) interferometer where the idler incurs loss
and additional dispersion in between two identical, lossless, squeezers; secondly,
the induced coherence interferometer where the idler incurs loss and additional
dispersion in between two identical, lossless, squeezers and where the second
squeezer is seeded by the idler and a vacuum ancilla mode. Furthermore, we consider
a distributed loss configuration where the idler incurs loss as it propagates
in the nonlinear medium. Motivated by experimental evidence and due to the fact
that broadband sources are ideal for these measurement schemes, we use the dispersive
data of a third-order dispersion engineered integrated waveguide parametric down
conversion (PDC) source presented in Roeder\r\n et
al\r\n (2024 New J. Phys.\r\n 26\r\n
\ 123025) to model the PDC spectra in the three configurations.
For each configuration we consider the case of idler-only (i) absorption, (ii)
additional dispersion, and (iii) the combined effects. We obtain results which
outline the strength and weaknesses of the different configurations at different
operation points.\r\n "
article_number: '074509'
author:
- first_name: Martin
full_name: Houde, Martin
last_name: Houde
- first_name: Franz
full_name: Roeder, Franz
id: '88149'
last_name: Roeder
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
- first_name: Benjamin
full_name: Brecht, Benjamin
id: '27150'
last_name: Brecht
orcid: '0000-0003-4140-0556 '
- first_name: Nicolás
full_name: Quesada, Nicolás
last_name: Quesada
citation:
ama: Houde M, Roeder F, Silberhorn C, Brecht B, Quesada N. High-gain effects in
broadband continuous-wave parametric down conversion sources and measurements
with undetected photons. New Journal of Physics. 2026;28(7). doi:10.1088/1367-2630/ae8692
apa: Houde, M., Roeder, F., Silberhorn, C., Brecht, B., & Quesada, N. (2026).
High-gain effects in broadband continuous-wave parametric down conversion sources
and measurements with undetected photons. New Journal of Physics, 28(7),
Article 074509. https://doi.org/10.1088/1367-2630/ae8692
bibtex: '@article{Houde_Roeder_Silberhorn_Brecht_Quesada_2026, title={High-gain
effects in broadband continuous-wave parametric down conversion sources and measurements
with undetected photons}, volume={28}, DOI={10.1088/1367-2630/ae8692},
number={7074509}, journal={New Journal of Physics}, publisher={IOP Publishing},
author={Houde, Martin and Roeder, Franz and Silberhorn, Christine and Brecht,
Benjamin and Quesada, Nicolás}, year={2026} }'
chicago: Houde, Martin, Franz Roeder, Christine Silberhorn, Benjamin Brecht, and
Nicolás Quesada. “High-Gain Effects in Broadband Continuous-Wave Parametric down
Conversion Sources and Measurements with Undetected Photons.” New Journal of
Physics 28, no. 7 (2026). https://doi.org/10.1088/1367-2630/ae8692.
ieee: 'M. Houde, F. Roeder, C. Silberhorn, B. Brecht, and N. Quesada, “High-gain
effects in broadband continuous-wave parametric down conversion sources and measurements
with undetected photons,” New Journal of Physics, vol. 28, no. 7, Art.
no. 074509, 2026, doi: 10.1088/1367-2630/ae8692.'
mla: Houde, Martin, et al. “High-Gain Effects in Broadband Continuous-Wave Parametric
down Conversion Sources and Measurements with Undetected Photons.” New Journal
of Physics, vol. 28, no. 7, 074509, IOP Publishing, 2026, doi:10.1088/1367-2630/ae8692.
short: M. Houde, F. Roeder, C. Silberhorn, B. Brecht, N. Quesada, New Journal of
Physics 28 (2026).
date_created: 2026-08-18T10:21:08Z
date_updated: 2026-08-18T10:21:29Z
department:
- _id: '15'
- _id: '623'
- _id: '288'
doi: 10.1088/1367-2630/ae8692
intvolume: ' 28'
issue: '7'
language:
- iso: eng
publication: New Journal of Physics
publication_identifier:
issn:
- 1367-2630
publication_status: published
publisher: IOP Publishing
status: public
title: High-gain effects in broadband continuous-wave parametric down conversion sources
and measurements with undetected photons
type: journal_article
user_id: '27150'
volume: 28
year: '2026'
...
---
_id: '66740'
abstract:
- lang: eng
text: "Abstract\r\n \r\n We
theoretically compare the quantum Fisher information (QFI) for three configurations
of absorption spectroscopy with undetected idler photons: an SU(1,1) interferometer
with inter-source idler loss, an induced-coherence (IC) setup in which the idler
partially seeds a second squeezer together with a vacuum ancilla, and a distributed-loss
(DL) scheme with in-medium attenuation. We calculate the QFI as a function of
parametric gain for both full and signal-only detection access. For losses below
99% and low to moderate gain, the SU(1,1) configuration provides the largest QFI.
At high gain and intermediate loss, the IC scheme performs best, while under extreme
attenuation (transmission\r\n \r\n \r\n
\ \r\n \r\n \r\n \r\n
\ <\r\n \r\n
\ \r\n \r\n
\ 1%) the DL model becomes optimal. These results delineate
the measurement regimes in which each architecture is optimal in terms of information
theory.\r\n "
article_number: '035013'
author:
- first_name: Martin
full_name: Houde, Martin
last_name: Houde
- first_name: Franz
full_name: Roeder, Franz
id: '88149'
last_name: Roeder
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
- first_name: Benjamin
full_name: Brecht, Benjamin
id: '27150'
last_name: Brecht
orcid: '0000-0003-4140-0556 '
- first_name: Nicolás
full_name: Quesada, Nicolás
last_name: Quesada
citation:
ama: 'Houde M, Roeder F, Silberhorn C, Brecht B, Quesada N. Quantum fisher information
analysis for absorption measurements with undetected photons. Journal of Physics:
Photonics. 2026;8(3). doi:10.1088/2515-7647/ae82a2'
apa: 'Houde, M., Roeder, F., Silberhorn, C., Brecht, B., & Quesada, N. (2026).
Quantum fisher information analysis for absorption measurements with undetected
photons. Journal of Physics: Photonics, 8(3), Article 035013. https://doi.org/10.1088/2515-7647/ae82a2'
bibtex: '@article{Houde_Roeder_Silberhorn_Brecht_Quesada_2026, title={Quantum fisher
information analysis for absorption measurements with undetected photons}, volume={8},
DOI={10.1088/2515-7647/ae82a2},
number={3035013}, journal={Journal of Physics: Photonics}, publisher={IOP Publishing},
author={Houde, Martin and Roeder, Franz and Silberhorn, Christine and Brecht,
Benjamin and Quesada, Nicolás}, year={2026} }'
chicago: 'Houde, Martin, Franz Roeder, Christine Silberhorn, Benjamin Brecht, and
Nicolás Quesada. “Quantum Fisher Information Analysis for Absorption Measurements
with Undetected Photons.” Journal of Physics: Photonics 8, no. 3 (2026).
https://doi.org/10.1088/2515-7647/ae82a2.'
ieee: 'M. Houde, F. Roeder, C. Silberhorn, B. Brecht, and N. Quesada, “Quantum fisher
information analysis for absorption measurements with undetected photons,” Journal
of Physics: Photonics, vol. 8, no. 3, Art. no. 035013, 2026, doi: 10.1088/2515-7647/ae82a2.'
mla: 'Houde, Martin, et al. “Quantum Fisher Information Analysis for Absorption
Measurements with Undetected Photons.” Journal of Physics: Photonics, vol.
8, no. 3, 035013, IOP Publishing, 2026, doi:10.1088/2515-7647/ae82a2.'
short: 'M. Houde, F. Roeder, C. Silberhorn, B. Brecht, N. Quesada, Journal of Physics:
Photonics 8 (2026).'
date_created: 2026-08-18T10:20:21Z
date_updated: 2026-08-18T10:20:54Z
department:
- _id: '15'
- _id: '623'
- _id: '288'
doi: 10.1088/2515-7647/ae82a2
intvolume: ' 8'
issue: '3'
language:
- iso: eng
publication: 'Journal of Physics: Photonics'
publication_identifier:
issn:
- 2515-7647
publication_status: published
publisher: IOP Publishing
status: public
title: Quantum fisher information analysis for absorption measurements with undetected
photons
type: journal_article
user_id: '27150'
volume: 8
year: '2026'
...
---
_id: '66094'
abstract:
- lang: eng
text: The two-qubit controlled-not (C-NOT) gate is an essential component for gate-based
quantum circuits. In fact, its operation, combined with single qubit rotations
allows to realise any quantum circuit. Several strategies have been adopted in
order to build quantum gates. Among them, photonics offers the dual advantage
of excellent isolation from the environment and ease of manipulation at the single
qubit level. Here we adopt a scalable time-multiplexed approach in order to build
a fully reconfigurable architecture capable of implementing a post-selected C-NOT
gate with a fidelity of (93.8 ± 1.4)%. We then show how our time-multiplexed platform
can be employed to combine a C-NOT and a single qubit gate in order to generate
the four Bell states.
article_number: '5683'
article_type: original
author:
- first_name: Federico
full_name: Pegoraro, Federico
id: '88928'
last_name: Pegoraro
- first_name: Philip
full_name: Held, Philip
id: '68236'
last_name: Held
- first_name: Jonas
full_name: Lammers, Jonas
last_name: Lammers
- first_name: Benjamin
full_name: Brecht, Benjamin
id: '27150'
last_name: Brecht
orcid: '0000-0003-4140-0556 '
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
citation:
ama: Pegoraro F, Held P, Lammers J, Brecht B, Silberhorn C. Demonstration of a quantum
C-NOT gate in a time-multiplexed fully reconfigurable photonic processor. Nature
Communications. 2026;17(1). doi:10.1038/s41467-026-74861-9
apa: Pegoraro, F., Held, P., Lammers, J., Brecht, B., & Silberhorn, C. (2026).
Demonstration of a quantum C-NOT gate in a time-multiplexed fully reconfigurable
photonic processor. Nature Communications, 17(1), Article 5683.
https://doi.org/10.1038/s41467-026-74861-9
bibtex: '@article{Pegoraro_Held_Lammers_Brecht_Silberhorn_2026, title={Demonstration
of a quantum C-NOT gate in a time-multiplexed fully reconfigurable photonic processor},
volume={17}, DOI={10.1038/s41467-026-74861-9},
number={15683}, journal={Nature Communications}, publisher={Springer Science and
Business Media LLC}, author={Pegoraro, Federico and Held, Philip and Lammers,
Jonas and Brecht, Benjamin and Silberhorn, Christine}, year={2026} }'
chicago: Pegoraro, Federico, Philip Held, Jonas Lammers, Benjamin Brecht, and Christine
Silberhorn. “Demonstration of a Quantum C-NOT Gate in a Time-Multiplexed Fully
Reconfigurable Photonic Processor.” Nature Communications 17, no. 1 (2026).
https://doi.org/10.1038/s41467-026-74861-9.
ieee: 'F. Pegoraro, P. Held, J. Lammers, B. Brecht, and C. Silberhorn, “Demonstration
of a quantum C-NOT gate in a time-multiplexed fully reconfigurable photonic processor,”
Nature Communications, vol. 17, no. 1, Art. no. 5683, 2026, doi: 10.1038/s41467-026-74861-9.'
mla: Pegoraro, Federico, et al. “Demonstration of a Quantum C-NOT Gate in a Time-Multiplexed
Fully Reconfigurable Photonic Processor.” Nature Communications, vol. 17,
no. 1, 5683, Springer Science and Business Media LLC, 2026, doi:10.1038/s41467-026-74861-9.
short: F. Pegoraro, P. Held, J. Lammers, B. Brecht, C. Silberhorn, Nature Communications
17 (2026).
date_created: 2026-07-01T07:47:15Z
date_updated: 2026-07-01T08:15:21Z
department:
- _id: '288'
- _id: '623'
- _id: '15'
doi: 10.1038/s41467-026-74861-9
intvolume: ' 17'
issue: '1'
keyword:
- Photonic Quantum Computing
- Time-multiplexing
- Quantum Information
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.nature.com/articles/s41467-026-74861-9
oa: '1'
publication: Nature Communications
publication_identifier:
issn:
- 2041-1723
publication_status: published
publisher: Springer Science and Business Media LLC
related_material:
link:
- description: Supplementary notes to the main article
relation: supplementary_material
url: https://static-content.springer.com/esm/art%3A10.1038%2Fs41467-026-74861-9/MediaObjects/41467_2026_74861_MOESM1_ESM.pdf
- description: Datasets and code
relation: supplementary_material
url: https://doi.org/10.5281/zenodo.20396394
status: public
title: Demonstration of a quantum C-NOT gate in a time-multiplexed fully reconfigurable
photonic processor
type: journal_article
user_id: '88928'
volume: 17
year: '2026'
...
---
_id: '61777'
abstract:
- lang: eng
text: "Classical shadows are succinct classical representations of quantum states\r\nwhich
allow one to encode a set of properties P of a quantum state rho, while\r\nonly
requiring measurements on logarithmically many copies of rho in the size\r\nof
P. In this work, we initiate the study of verification of classical shadows,\r\ndenoted
classical shadow validity (CSV), from the perspective of computational\r\ncomplexity,
which asks: Given a classical shadow S, how hard is it to verify\r\nthat S predicts
the measurement statistics of a quantum state? We show that\r\neven for the elegantly
simple classical shadow protocol of [Huang, Kueng,\r\nPreskill, Nature Physics
2020] utilizing local Clifford measurements, CSV is\r\nQMA-complete. This hardness
continues to hold for the high-dimensional\r\nextension of said protocol due to
[Mao, Yi, and Zhu, PRL 2025]. Among other\r\nresults, we also show that CSV for
exponentially many observables is complete\r\nfor a quantum generalization of
the second level of the polynomial hierarchy,\r\nyielding the first natural complete
problem for such a class."
author:
- first_name: Georgios
full_name: Karaiskos, Georgios
last_name: Karaiskos
- first_name: Dorian
full_name: Rudolph, Dorian
id: '57863'
last_name: Rudolph
- first_name: Johannes Jakob
full_name: Meyer, Johannes Jakob
last_name: Meyer
- first_name: Jens
full_name: Eisert, Jens
last_name: Eisert
- first_name: Sevag
full_name: Gharibian, Sevag
id: '71541'
last_name: Gharibian
orcid: 0000-0002-9992-3379
citation:
ama: 'Karaiskos G, Rudolph D, Meyer JJ, Eisert J, Gharibian S. How hard is it to
verify a classical shadow? In: International Colloquium on Automata, Languages,
and Programming (ICALP). Vol 374. ; 2026:1-23.'
apa: Karaiskos, G., Rudolph, D., Meyer, J. J., Eisert, J., & Gharibian, S. (2026).
How hard is it to verify a classical shadow? International Colloquium on Automata,
Languages, and Programming (ICALP), 374(123), 1–23.
bibtex: '@inproceedings{Karaiskos_Rudolph_Meyer_Eisert_Gharibian_2026, title={How
hard is it to verify a classical shadow?}, volume={374}, number={123}, booktitle={International
Colloquium on Automata, Languages, and Programming (ICALP)}, author={Karaiskos,
Georgios and Rudolph, Dorian and Meyer, Johannes Jakob and Eisert, Jens and Gharibian,
Sevag}, year={2026}, pages={1–23} }'
chicago: Karaiskos, Georgios, Dorian Rudolph, Johannes Jakob Meyer, Jens Eisert,
and Sevag Gharibian. “How Hard Is It to Verify a Classical Shadow?” In International
Colloquium on Automata, Languages, and Programming (ICALP), 374:1–23, 2026.
ieee: G. Karaiskos, D. Rudolph, J. J. Meyer, J. Eisert, and S. Gharibian, “How hard
is it to verify a classical shadow?,” in International Colloquium on Automata,
Languages, and Programming (ICALP), 2026, vol. 374, no. 123, pp. 1–23.
mla: Karaiskos, Georgios, et al. “How Hard Is It to Verify a Classical Shadow?”
International Colloquium on Automata, Languages, and Programming (ICALP),
vol. 374, no. 123, 2026, pp. 1–23.
short: 'G. Karaiskos, D. Rudolph, J.J. Meyer, J. Eisert, S. Gharibian, in: International
Colloquium on Automata, Languages, and Programming (ICALP), 2026, pp. 1–23.'
date_created: 2025-10-10T13:45:07Z
date_updated: 2026-07-01T15:30:26Z
department:
- _id: '7'
- _id: '623'
external_id:
arxiv:
- '2510.08515'
intvolume: ' 374'
issue: '123'
language:
- iso: eng
page: 1-23
publication: International Colloquium on Automata, Languages, and Programming (ICALP)
publication_status: published
status: public
title: How hard is it to verify a classical shadow?
type: conference
user_id: '71541'
volume: 374
year: '2026'
...
---
_id: '66632'
abstract:
- lang: eng
text: Three‐dimensional (3D) assemblies of gold nanoparticles (AuNPs) offer a rich
platform for plasmonic coupling and near‐field engineering, yet their optical
behavior is often complex due to structural disorder and fabrication‐induced variability.
Here, we present a systematic optical investigation of large‐scale 3D AuNP assemblies
fabricated via meniscus‐guided assembly, focusing on the reproducibility, spatial
uniformity, and mode evolution of their plasmonic responses. Spatially‐resolved
dark‐field scattering measurements reveal that high‐aspect‐ratio AuNP pillars
exhibit uniform scattering spectra along their height and across different pillars,
despite variations in geometry and structure. Electromagnetic simulations suggest
that this robustness arises from a collective many‐particle plasmonic response
that remains optically active despite structural perturbations. The corresponding
near‐field and surface‐charge distributions remain spatially distributed under
representative structural perturbations, consistent with volumetric averaging
across the three‐dimensional assembly. Building on this robust platform, we introduce
compositional modulation through a core–satellite architecture by incorporating
smaller AuNPs. This yields a composition‐dependent spectral redistribution, including
the emergence of an additional long‐wavelength spectral feature in the core–satellite
assemblies. Wavelength‐dependent surface‐enhanced Raman scattering measurements
reveal contrasting responses under 633 and 785 nm excitation, reflecting redistribution
of local plasmonic coupling pathways. These results provide process‐enabled guidelines
for using meniscus‐guided 3D‐nanoprinting to realize robust nanoparticle assemblies.
article_number: e71686
article_type: original
author:
- first_name: Vasanthan
full_name: Devaraj, Vasanthan
id: '103814'
last_name: Devaraj
- first_name: Sunghyun
full_name: Kwak, Sunghyun
last_name: Kwak
- first_name: Hyeongjip
full_name: Kim, Hyeongjip
last_name: Kim
- first_name: Sang‐Keun
full_name: Sung, Sang‐Keun
last_name: Sung
- first_name: Jong‐Min
full_name: Lee, Jong‐Min
last_name: Lee
- first_name: Thomas
full_name: Zentgraf, Thomas
id: '30525'
last_name: Zentgraf
orcid: 0000-0002-8662-1101
- first_name: Won‐Geun
full_name: Kim, Won‐Geun
last_name: Kim
citation:
ama: Devaraj V, Kwak S, Kim H, et al. Spatially Uniform and Defect‐Tolerant Plasmonic
Responses in 3D Printed Gold Nanoparticle Assemblies. Laser & Photonics
Reviews. Published online 2026. doi:10.1002/lpor.71686
apa: Devaraj, V., Kwak, S., Kim, H., Sung, S., Lee, J., Zentgraf, T., & Kim,
W. (2026). Spatially Uniform and Defect‐Tolerant Plasmonic Responses in 3D Printed
Gold Nanoparticle Assemblies. Laser & Photonics Reviews, Article
e71686. https://doi.org/10.1002/lpor.71686
bibtex: '@article{Devaraj_Kwak_Kim_Sung_Lee_Zentgraf_Kim_2026, title={Spatially
Uniform and Defect‐Tolerant Plasmonic Responses in 3D Printed Gold Nanoparticle
Assemblies}, DOI={10.1002/lpor.71686},
number={e71686}, journal={Laser & Photonics Reviews}, publisher={Wiley},
author={Devaraj, Vasanthan and Kwak, Sunghyun and Kim, Hyeongjip and Sung, Sang‐Keun
and Lee, Jong‐Min and Zentgraf, Thomas and Kim, Won‐Geun}, year={2026} }'
chicago: Devaraj, Vasanthan, Sunghyun Kwak, Hyeongjip Kim, Sang‐Keun Sung, Jong‐Min
Lee, Thomas Zentgraf, and Won‐Geun Kim. “Spatially Uniform and Defect‐Tolerant
Plasmonic Responses in 3D Printed Gold Nanoparticle Assemblies.” Laser &
Photonics Reviews, 2026. https://doi.org/10.1002/lpor.71686.
ieee: 'V. Devaraj et al., “Spatially Uniform and Defect‐Tolerant Plasmonic
Responses in 3D Printed Gold Nanoparticle Assemblies,” Laser & Photonics
Reviews, Art. no. e71686, 2026, doi: 10.1002/lpor.71686.'
mla: Devaraj, Vasanthan, et al. “Spatially Uniform and Defect‐Tolerant Plasmonic
Responses in 3D Printed Gold Nanoparticle Assemblies.” Laser & Photonics
Reviews, e71686, Wiley, 2026, doi:10.1002/lpor.71686.
short: V. Devaraj, S. Kwak, H. Kim, S. Sung, J. Lee, T. Zentgraf, W. Kim, Laser
& Photonics Reviews (2026).
date_created: 2026-08-03T06:43:03Z
date_updated: 2026-08-03T06:45:01Z
department:
- _id: '15'
- _id: '230'
- _id: '289'
- _id: '623'
doi: 10.1002/lpor.71686
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://onlinelibrary.wiley.com/doi/10.1002/lpor.71686
oa: '1'
publication: Laser & Photonics Reviews
publication_identifier:
issn:
- 1863-8880
- 1863-8899
publication_status: published
publisher: Wiley
quality_controlled: '1'
status: public
title: Spatially Uniform and Defect‐Tolerant Plasmonic Responses in 3D Printed Gold
Nanoparticle Assemblies
type: journal_article
user_id: '30525'
year: '2026'
...
---
_id: '66665'
abstract:
- lang: eng
text: Multimode quantum light has promising applications in many areas of physics,
such as quantum communications and quantum computing. However, its multimode nature
also makes it challenging to measure its properties. Recently [I. Barakat et al.,
Optica Quantum 3, 36 (2025)], a technique for the simultaneous measurement of
squeezing of multiple broadband modes based on a phase-sensitive amplification
approach was experimentally implemented using a setup that effectively corresponds
to an SU(1,1) interferometer. Here, we aim to provide a complete theoretical analysis
of the modal structure of (generally unbalanced) SU(1,1) interferometers and a
detailed theoretical formal derivation of the framework for this technique. Utilizing
the joint Schmidt decomposition of the transfer functions, we investigate the
shape and phase profiles of the modes of the SU(1,1) interferometer and its components
[parametric down-conversion (PDC) sections] for different parametric gain regimes.
We discover a complicated interplay between the PDC modes and the modes of the
entire interferometer, and analyze it by using their overlap coefficients as a
similarity measure. Finally, we develop a rigorous processing method for the aforementioned
multimode squeezing measurement technique and discuss necessary approximations
to make this method experimentally feasible.
article_number: '033139'
article_type: original
author:
- first_name: Dennis
full_name: Scharwald, Dennis
id: '55907'
last_name: Scharwald
orcid: 0009-0007-5654-5412
- first_name: Polina
full_name: Sharapova, Polina
id: '60286'
last_name: Sharapova
citation:
ama: Scharwald D, Sharapova P. Characterization of spatial Schmidt modes in high-gain
SU(1,1) interferometers. Physical Review Research. 2026;8(3). doi:10.1103/ph64-ts39
apa: Scharwald, D., & Sharapova, P. (2026). Characterization of spatial Schmidt
modes in high-gain SU(1,1) interferometers. Physical Review Research, 8(3),
Article 033139. https://doi.org/10.1103/ph64-ts39
bibtex: '@article{Scharwald_Sharapova_2026, title={Characterization of spatial Schmidt
modes in high-gain SU(1,1) interferometers}, volume={8}, DOI={10.1103/ph64-ts39},
number={3033139}, journal={Physical Review Research}, publisher={American Physical
Society (APS)}, author={Scharwald, Dennis and Sharapova, Polina}, year={2026}
}'
chicago: Scharwald, Dennis, and Polina Sharapova. “Characterization of Spatial Schmidt
Modes in High-Gain SU(1,1) Interferometers.” Physical Review Research 8,
no. 3 (2026). https://doi.org/10.1103/ph64-ts39.
ieee: 'D. Scharwald and P. Sharapova, “Characterization of spatial Schmidt modes
in high-gain SU(1,1) interferometers,” Physical Review Research, vol. 8,
no. 3, Art. no. 033139, 2026, doi: 10.1103/ph64-ts39.'
mla: Scharwald, Dennis, and Polina Sharapova. “Characterization of Spatial Schmidt
Modes in High-Gain SU(1,1) Interferometers.” Physical Review Research,
vol. 8, no. 3, 033139, American Physical Society (APS), 2026, doi:10.1103/ph64-ts39.
short: D. Scharwald, P. Sharapova, Physical Review Research 8 (2026).
date_created: 2026-08-05T11:51:21Z
date_updated: 2026-08-12T14:29:44Z
department:
- _id: '975'
- _id: '15'
- _id: '623'
- _id: '569'
- _id: '170'
- _id: '35'
- _id: '429'
- _id: '34'
- _id: '502'
doi: 10.1103/ph64-ts39
intvolume: ' 8'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://journals.aps.org/prresearch/pdf/10.1103/ph64-ts39
oa: '1'
project:
- _id: '56'
name: TRR 142 - Project Area C
- _id: '53'
name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
zu funktionellen Strukturen'
- _id: '174'
name: 'TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen
Systemen: Eine theoretische Analyse'
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: Physical Review Research
publication_identifier:
issn:
- 2643-1564
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Characterization of spatial Schmidt modes in high-gain SU(1,1) interferometers
type: journal_article
user_id: '55907'
volume: 8
year: '2026'
...
---
_id: '66744'
author:
- first_name: Henna
full_name: Farheen, Henna
id: '53444'
last_name: Farheen
orcid: 0000-0001-7730-3489
- first_name: Yuheng
full_name: Chen, Yuheng
last_name: Chen
- first_name: Peigang
full_name: Chen, Peigang
last_name: Chen
- first_name: Pranshu
full_name: Maan, Pranshu
last_name: Maan
- first_name: Samuel
full_name: Peana, Samuel
last_name: Peana
- first_name: Alexander
full_name: Senichev, Alexander
last_name: Senichev
- first_name: Vladimir M.
full_name: Shalaev, Vladimir M.
last_name: Shalaev
- first_name: Alexandra
full_name: Boltasseva, Alexandra
last_name: Boltasseva
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: Alexander V.
full_name: Kildishev, Alexander V.
last_name: Kildishev
citation:
ama: Farheen H, Chen Y, Chen P, et al. Efficient Silicon Nitride Quantum Interconnect
for Intrinsic Silicon Nitride Single-Photon Emitters. IEEE Journal of Selected
Topics in Quantum Electronics. Published online 2026:1-12. doi:10.1109/jstqe.2026.3722063
apa: Farheen, H., Chen, Y., Chen, P., Maan, P., Peana, S., Senichev, A., Shalaev,
V. M., Boltasseva, A., Förstner, J., & Kildishev, A. V. (2026). Efficient
Silicon Nitride Quantum Interconnect for Intrinsic Silicon Nitride Single-Photon
Emitters. IEEE Journal of Selected Topics in Quantum Electronics, 1–12.
https://doi.org/10.1109/jstqe.2026.3722063
bibtex: '@article{Farheen_Chen_Chen_Maan_Peana_Senichev_Shalaev_Boltasseva_Förstner_Kildishev_2026,
title={Efficient Silicon Nitride Quantum Interconnect for Intrinsic Silicon Nitride
Single-Photon Emitters}, DOI={10.1109/jstqe.2026.3722063},
journal={IEEE Journal of Selected Topics in Quantum Electronics}, publisher={Institute
of Electrical and Electronics Engineers (IEEE)}, author={Farheen, Henna and Chen,
Yuheng and Chen, Peigang and Maan, Pranshu and Peana, Samuel and Senichev, Alexander
and Shalaev, Vladimir M. and Boltasseva, Alexandra and Förstner, Jens and Kildishev,
Alexander V.}, year={2026}, pages={1–12} }'
chicago: Farheen, Henna, Yuheng Chen, Peigang Chen, Pranshu Maan, Samuel Peana,
Alexander Senichev, Vladimir M. Shalaev, Alexandra Boltasseva, Jens Förstner,
and Alexander V. Kildishev. “Efficient Silicon Nitride Quantum Interconnect for
Intrinsic Silicon Nitride Single-Photon Emitters.” IEEE Journal of Selected
Topics in Quantum Electronics, 2026, 1–12. https://doi.org/10.1109/jstqe.2026.3722063.
ieee: 'H. Farheen et al., “Efficient Silicon Nitride Quantum Interconnect
for Intrinsic Silicon Nitride Single-Photon Emitters,” IEEE Journal of Selected
Topics in Quantum Electronics, pp. 1–12, 2026, doi: 10.1109/jstqe.2026.3722063.'
mla: Farheen, Henna, et al. “Efficient Silicon Nitride Quantum Interconnect for
Intrinsic Silicon Nitride Single-Photon Emitters.” IEEE Journal of Selected
Topics in Quantum Electronics, Institute of Electrical and Electronics Engineers
(IEEE), 2026, pp. 1–12, doi:10.1109/jstqe.2026.3722063.
short: H. Farheen, Y. Chen, P. Chen, P. Maan, S. Peana, A. Senichev, V.M. Shalaev,
A. Boltasseva, J. Förstner, A.V. Kildishev, IEEE Journal of Selected Topics in
Quantum Electronics (2026) 1–12.
date_created: 2026-08-19T11:37:05Z
date_updated: 2026-08-19T13:07:08Z
ddc:
- '530'
department:
- _id: '61'
- _id: '230'
- _id: '623'
doi: 10.1109/jstqe.2026.3722063
file:
- access_level: local
content_type: application/pdf
creator: fossie
date_created: 2026-08-19T13:04:15Z
date_updated: 2026-08-19T13:04:15Z
embargo: 2027-08-19
embargo_to: open_access
file_id: '66745'
file_name: 2026-08 Farheen - IEEE JSTQE - Efficient_Silicon_Nitride_Quantum_Interconnect_for_Intrinsic_Silicon_Nitride_Single-Photon_Emitters
(PREPRINT).pdf
file_size: 33382776
relation: main_file
file_date_updated: 2026-08-19T13:04:15Z
has_accepted_license: '1'
keyword:
- tet_topic_opticalantenna
language:
- iso: eng
page: 1-12
project:
- _id: '266'
name: 'PhoQC: Photonisches Quantencomputing'
publication: IEEE Journal of Selected Topics in Quantum Electronics
publication_identifier:
issn:
- 1077-260X
- 1558-4542
publication_status: published
publisher: Institute of Electrical and Electronics Engineers (IEEE)
status: public
title: Efficient Silicon Nitride Quantum Interconnect for Intrinsic Silicon Nitride
Single-Photon Emitters
type: journal_article
user_id: '158'
year: '2026'
...