@article{65096,
  abstract     = {{<jats:p>
                    Precise measurements of both the arrival time and carrier frequency of light pulses are essential for time–frequency-encoded quantum technologies. Quantum mechanics, however, imposes fundamental limits on the simultaneous determination of these quantities. In this work, we derive and experimentally verify the quantum uncertainty bounds governing joint time–frequency measurements. We show that when detection is restricted to finite time windows, the problem is naturally described by a quantum rotor, rendering the commonly used Heisenberg uncertainty relation inapplicable. We further propose an optimal detection scheme that saturates these fundamental limits. By sampling the
                    <jats:italic toggle="yes">Q</jats:italic>
                    -function, we demonstrate the reconstruction of the Wigner function beyond the harmonic oscillator. Using an experimental implementation based on a quantum pulse gate, we confirm that the proposed scheme approaches the ultimate quantum limit for simultaneous time–frequency measurements. These results provide a framework for joint time–frequency detection with direct implications for precision measurements and quantum information processing.
                  </jats:p>}},
  author       = {{Folge, Patrick Fabian and Serino, Laura Maria and Mišta, Ladislav and Brecht, Benjamin and Silberhorn, Christine and Řeháček, Jaroslav and Hradil, Zdeněk}},
  issn         = {{2334-2536}},
  journal      = {{Optica}},
  number       = {{3}},
  publisher    = {{Optica Publishing Group}},
  title        = {{{Quantum-limited detection of the arrival time and the carrier frequency of time-dependent signals}}},
  doi          = {{10.1364/optica.579459}},
  volume       = {{13}},
  year         = {{2026}},
}

@article{60136,
  abstract     = {{<jats:p>Modulation conditioned on measurements on entangled photonic quantum states is a cornerstone technology of optical quantum information processing. Performing this task with low latency requires combining single-photon-level detectors with both electronic logic processing and optical modulation in close proximity. Here, we demonstrate low-latency feedforward using a quasi-photon-number-resolved measurement on a quantum light source. Specifically, we use a multipixel superconducting nanowire single-photon detector, amplifier, logic, and an integrated electro-optic modulator <jats:italic toggle="yes">in situ</jats:italic> below 4 K. We modulate the signal mode of a spontaneous parametric down-conversion source, conditional on a photon-number measurement of the idler mode, with a total latency of (23±3)ns. Furthermore, we investigate the resulting change in the photon statistics. This represents an important benchmark for the fastest quantum photonic feedforward experiments comprising measurement, amplification, logic, and modulation. This has direct applications in quantum computing, communication, and simulation protocols.</jats:p>}},
  author       = {{Thiele, Frederik and Lamberty, Niklas and Hummel, Thomas and Lange, Nina Amelie and Procopio Peña, Lorenzo Manuel and Barua, Aishi and Lengeling, Sebastian and Quiring, Viktor and Eigner, Christof and Silberhorn, Christine and Bartley, Tim}},
  issn         = {{2334-2536}},
  journal      = {{Optica}},
  number       = {{5}},
  publisher    = {{Optica Publishing Group}},
  title        = {{{Cryogenic feedforward of a photonic quantum state}}},
  doi          = {{10.1364/optica.551287}},
  volume       = {{12}},
  year         = {{2025}},
}

@article{30342,
  author       = {{Lange, Nina Amelie and Höpker, Jan Philipp and Ricken, Raimund and Quiring, Viktor and Eigner, Christof and Silberhorn, Christine and Bartley, Tim}},
  issn         = {{2334-2536}},
  journal      = {{Optica}},
  keywords     = {{Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials}},
  number       = {{1}},
  publisher    = {{The Optical Society}},
  title        = {{{Cryogenic integrated spontaneous parametric down-conversion}}},
  doi          = {{10.1364/optica.445576}},
  volume       = {{9}},
  year         = {{2022}},
}

@article{26410,
  author       = {{Gil López, Jano and Teo, Yong Siah and De, Syamsundar and Brecht, Benjamin and Jeong, Hyunseok and Silberhorn, Christine and Sánchez-Soto, Luis L.}},
  issn         = {{2334-2536}},
  journal      = {{Optica}},
  title        = {{{Universal compressive tomography in the time-frequency domain}}},
  doi          = {{10.1364/optica.427645}},
  year         = {{2021}},
}

@article{21028,
  author       = {{Ansari, Vahid and Donohue, John M. and Brecht, Benjamin and Silberhorn, Christine}},
  issn         = {{2334-2536}},
  journal      = {{Optica}},
  number       = {{5}},
  title        = {{{Tailoring nonlinear processes for quantum optics with pulsed temporal-mode encodings}}},
  doi          = {{10.1364/optica.5.000534}},
  volume       = {{5}},
  year         = {{2018}},
}

@article{38052,
  author       = {{Montaut, Nicola and Magaña-Loaiza, Omar S. and Bartley, Tim and Verma, Varun B. and Nam, Sae Woo and Mirin, Richard P. and Silberhorn, Christine and Gerrits, Thomas}},
  issn         = {{2334-2536}},
  journal      = {{Optica}},
  keywords     = {{Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials}},
  number       = {{11}},
  publisher    = {{The Optical Society}},
  title        = {{{Compressive characterization of telecom photon pairs in the spatial and spectral degrees of freedom}}},
  doi          = {{10.1364/optica.5.001418}},
  volume       = {{5}},
  year         = {{2018}},
}

@article{6545,
  abstract     = {{We develop a nanoscopy method with in-depth resolution for layered photonic devices. Photonics often requires tailored light field distributions for the optical modes used, and an exact knowledge of the geometry of a device is crucial to assess its performance. The presented acousto-optical nanoscopy method is based on the uniqueness of the light field distributions in photonic devices: for a given wavelength, we record the reflectivity modulation during the transit of a picosecond acoustic pulse. The temporal profile obtained can be linked to the internal light field distribution. From this information, a reverse-engineering procedure allows us to reconstruct the light field and the underlying photonic structure very precisely. We apply this method to the slow light mode of an AlAs/GaAs micropillar resonator and show its validity for the tailored experimental conditions.}},
  author       = {{Czerniuk, T. and Schneider, C. and Kamp, M. and Höfling, S. and Glavin, B. A. and Yakovlev, D. R. and Akimov, A. V. and Bayer, M.}},
  issn         = {{2334-2536}},
  journal      = {{Optica}},
  number       = {{6}},
  publisher    = {{The Optical Society}},
  title        = {{{Acousto-optical nanoscopy of buried photonic nanostructures}}},
  doi          = {{10.1364/optica.4.000588}},
  volume       = {{4}},
  year         = {{2017}},
}

@article{678,
  author       = {{Georgi, Philip and Schlickriede, Christian and Li, Guixin and Zhang, Shuang and Zentgraf, Thomas}},
  issn         = {{2334-2536}},
  journal      = {{Optica}},
  number       = {{8}},
  publisher    = {{The Optical Society}},
  title        = {{{Rotational Doppler shift induced by spin-orbit coupling of light at spinning metasurfaces}}},
  doi          = {{10.1364/optica.4.001000}},
  volume       = {{4}},
  year         = {{2017}},
}

@article{38086,
  author       = {{Tiranov, Alexey and Lavoie, Jonathan and Ferrier, Alban and Goldner, Philippe and Verma, Varun B. and Nam, Sae Woo and Mirin, Richard P. and Lita, Adriana E. and Marsili, Francesco and Herrmann, Harald and Silberhorn, Christine and Gisin, Nicolas and Afzelius, Mikael and Bussières, Félix}},
  issn         = {{2334-2536}},
  journal      = {{Optica}},
  keywords     = {{Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials}},
  number       = {{4}},
  publisher    = {{The Optical Society}},
  title        = {{{Storage of hyperentanglement in a solid-state quantum memory}}},
  doi          = {{10.1364/optica.2.000279}},
  volume       = {{2}},
  year         = {{2015}},
}