@misc{59238,
author = {{Bürgel, Christoph and Schlaak, Claudia and Willems, Aline}},
title = {{{Förderung der mündlichen Sprachproduktion im Fremdsprachenunterricht. Perspektiven aus Wissenschaft und Praxis, in: bzf 69, 85-88.}}},
year = {{2025}},
}
@misc{61035,
author = {{Bürgel, Christoph and Siepmann, Dirk}},
booktitle = {{FAZ}},
title = {{{- Digitalisierung als Wunderwaffe }}},
year = {{2025}},
}
@misc{59818,
booktitle = {{ Zeitschrift für Romanische Sprachen und ihre Didaktik}},
editor = {{Bürgel, Christoph and Heiderich, Jens and Koch, Corinna and Schlaak, Claudia and Visser, Judith}},
number = {{1}},
publisher = {{ Stuttgart: ibidem }},
title = {{{ Zeitschrift für Romanische Sprachen und ihre Didaktik,}}},
volume = {{19}},
year = {{2025}},
}
@inproceedings{59816,
author = {{Pape, Gerrit and Wintermann, Bjarne and Jungemann, Linus and Lass, Michael and Meyer, Marius and Riebler, Heinrich and Plessl, Christian}},
booktitle = {{Proceedings of the 15th International Symposium on Highly Efficient Accelerators and Reconfigurable Technologies}},
location = {{Kumamoto, Japan}},
title = {{{AuroraFlow, an Easy-to-Use, Low-Latency FPGA Communication Solution Demonstrated on Multi-FPGA Neural Network Inference}}},
doi = {{10.1145/3728179.3728190}},
year = {{2025}},
}
@inproceedings{65618,
author = {{Bröker, Mika and Menzel, Johannes and Plessl, Christian}},
booktitle = {{Proceedings of the 15th International Symposium on Highly Efficient Accelerators and Reconfigurable Technologies}},
publisher = {{ACM}},
title = {{{Evaluating the Strong Scaling Potential of AI Engines for Molecular Dynamics Simulations}}},
doi = {{10.1145/3728179.3728187}},
year = {{2025}},
}
@inproceedings{59878,
abstract = {{Abstract. In the development of advanced lightweight automotive solutions, self-piercing riveting (SPR) offers the possibility of joining multi-material structures to fulfil a wide variety of requirements. With regard to the entire process chain, production-related pre-deformations of the parts to be joined can influence the geometric shape and load capacity of SPR joints. Various studies have investigated the influence of pre-stretched sheet materials, in the sense of pre-drawing processes, on the formation of SPR joints. The impact of pre-stretching sheet metals on the formation of their geometrical characteristics and the shear-tensile strength of SPR processes was observed [1]. Pre-rolled semi-finished products are also joined together in mixed material automotive structures, e.g. tailor rolled blanks. This work aims to investigate the influence of pre-rolled joining parts on the geometric formation and load-carrying capacity of SPR joints. For this purpose, sheets of metal are cold-formed using a rolling process to induce a defined strain-hardening state in the material and then joined in various combinations. As the degree of deformation increases, the rolling of samples can lead to minimal accumulation of damage in the sheet materials, which can influence the joint behaviour. The rolling process, as well as the subsequent joining process, are also investigated by FEM. The influence of pre-rolled semi-finished products on the strength of the SPR joints is investigated.}},
author = {{Schlichter, Malte Christian and Harabati, Özcan and Ludwig, Jean-Patrick and Böhnke, Max and Bielak, Christian Roman and Bobbert, Mathias and Meschut, Gerson}},
booktitle = {{Materials Research Proceedings}},
issn = {{2474-395X}},
publisher = {{Materials Research Forum LLC}},
title = {{{Experimental and numerical investigation of the influence of rolling-induced sheet metal deformation on SPR joints}}},
doi = {{10.21741/9781644903599-148}},
volume = {{54}},
year = {{2025}},
}
@article{65611,
abstract = {{
Spins confined in optically active quantum dot molecules (QDMs) can be used for the deterministic generation of photonic graph states with tailored entanglement structures. Their usefulness for the generation of such nonclassical states of light is determined by orbital and spin decoherence mechanisms, particularly phonon-mediated processes dominant at energy scales up to a few millielectronvolts. Here, we directly measure the spectral function of orbital phonon relaxation between the energy states of the neutral exciton in a QDM and benchmark our findings against microscopic
k
·
p
theory. Our results reveal pronounced resonances and antiresonances in the phonon-relaxation rates, ranging from tens of
µ
s
−
1
up to tens of
ns
−
1
. Comparison with a kinetic model reveals the voltage (energy) dependent phonon coupling strength and fully explains the interplay between phonon-assisted relaxation and radiative recombination. The resonances and antiresonances enable further tunability of the exciton lifetime which can be leveraged to increase the lifetime of energetically unfavorable charge configurations needed for realizing efficient spin-photon interfaces and multidimensional cluster states.
}},
author = {{Lienhart, Michelle and Gawarecki, Krzysztof and Stöcker, Markus and Bopp, Frederik and Cullip, Charlotte and Akhlaq, Nadeem and Thalacker, Christopher and Schall, Johannes and Rodt, Sven and Ludwig, Arne and Reuter, Dirk and Reitzenstein, Stephan and Müller, Kai and Machnikowski, Paweł and Finley, Jonathan J.}},
issn = {{2469-9950}},
journal = {{Physical Review B}},
number = {{23}},
publisher = {{American Physical Society (APS)}},
title = {{{Resonant and antiresonant exciton-phonon coupling in quantum dot molecules}}},
doi = {{10.1103/xc25-1tph}},
volume = {{112}},
year = {{2025}},
}
@inproceedings{50272,
abstract = {{Despite the fundamental role the Quantum Satisfiability (QSAT) problem has
played in quantum complexity theory, a central question remains open: At which
local dimension does the complexity of QSAT transition from "easy" to "hard"?
Here, we study QSAT with each constraint acting on a $k$-dimensional and
$l$-dimensional qudit pair, denoted $(k,l)$-QSAT. Our first main result shows
that, surprisingly, QSAT on qubits can remain $\mathsf{QMA}_1$-hard, in that
$(2,5)$-QSAT is $\mathsf{QMA}_1$-complete. In contrast, $2$-SAT on qubits is
well-known to be poly-time solvable [Bravyi, 2006]. Our second main result
proves that $(3,d)$-QSAT on the 1D line with $d\in O(1)$ is also
$\mathsf{QMA}_1$-hard. Finally, we initiate the study of 1D $(2,d)$-QSAT by
giving a frustration-free 1D Hamiltonian with a unique, entangled ground state.
Our first result uses a direct embedding, combining a novel clock
construction with the 2D circuit-to-Hamiltonian construction of [Gosset, Nagaj,
2013]. Of note is a new simplified and analytic proof for the latter (as
opposed to a partially numeric proof in [GN13]). This exploits Unitary Labelled
Graphs [Bausch, Cubitt, Ozols, 2017] together with a new "Nullspace Connection
Lemma", allowing us to break low energy analyses into small patches of
projectors, and to improve the soundness analysis of [GN13] from
$\Omega(1/T^6)$ to $\Omega(1/T^2)$, for $T$ the number of gates. Our second
result goes via black-box reduction: Given an arbitrary 1D Hamiltonian $H$ on
$d'$-dimensional qudits, we show how to embed it into an effective null-space
of a 1D $(3,d)$-QSAT instance, for $d\in O(1)$. Our approach may be viewed as a
weaker notion of "simulation" (\`a la [Bravyi, Hastings 2017], [Cubitt,
Montanaro, Piddock 2018]). As far as we are aware, this gives the first
"black-box simulation"-based $\mathsf{QMA}_1$-hardness result, i.e. for
frustration-free Hamiltonians.}},
author = {{Rudolph, Dorian and Gharibian, Sevag and Nagaj, Daniel}},
booktitle = {{16th Innovations in Theoretical Computer Science (ITCS)}},
number = {{85}},
pages = {{1--24}},
title = {{{Quantum 2-SAT on low dimensional systems is $\mathsf{QMA}_1$-complete: Direct embeddings and black-box simulation}}},
doi = {{10.4230/LIPIcs.ITCS.2025.85}},
volume = {{325}},
year = {{2025}},
}
@article{63513,
author = {{Grimminger-Seidensticker, Elke and Treder, Alexandra and Niederhaus, Constanze}},
journal = {{Zeitschrift für Sportpädagogische Forschung}},
number = {{2}},
pages = {{189--212}},
publisher = {{Nomos}},
title = {{{Sprachbezogene Kompetenzerwartungen im Sportunterricht – Eine systematische Lehrplananalyse}}},
doi = {{https://doi.org/10.5771/2196-5218-2025-2-189}},
volume = {{13}},
year = {{2025}},
}
@article{55037,
abstract = {{Estimating ground state energies of many-body Hamiltonians is a central task
in many areas of quantum physics. In this work, we give quantum algorithms
which, given any $k$-body Hamiltonian $H$, compute an estimate for the ground
state energy and prepare a quantum state achieving said energy, respectively.
Specifically, for any $\varepsilon>0$, our algorithms return, with high
probability, an estimate of the ground state energy of $H$ within additive
error $\varepsilon M$, or a quantum state with the corresponding energy. Here,
$M$ is the total strength of all interaction terms, which in general is
extensive in the system size. Our approach makes no assumptions about the
geometry or spatial locality of interaction terms of the input Hamiltonian and
thus handles even long-range or all-to-all interactions, such as in quantum
chemistry, where lattice-based techniques break down. In this fully general
setting, the runtime of our algorithms scales as $2^{cn/2}$ for $c<1$, yielding
the first quantum algorithms for low-energy estimation breaking the natural
bound based on Grover search. The core of our approach is remarkably simple,
and relies on showing that any $k$-body Hamiltonian has a low-energy subspace
of exponential dimension.}},
author = {{Buhrman, Harry and Gharibian, Sevag and Landau, Zeph and Gall, François Le and Schuch, Norbert and Tamaki, Suguru}},
journal = {{Physical Review Letters}},
pages = {{030601}},
title = {{{Beating Grover search for low-energy estimation and state preparation}}},
doi = {{10.1103/29qw-bssx}},
volume = {{135}},
year = {{2025}},
}
@unpublished{61776,
abstract = {{We investigate the role of energy, i.e. average photon number, as a resource
in the computational complexity of bosonic systems. We show three sets of
results: (1. Energy growth rates) There exist bosonic gate sets which increase
energy incredibly rapidly, obtaining e.g. infinite energy in finite/constant
time. We prove these high energies can make computing properties of bosonic
computations, such as deciding whether a given computation will attain infinite
energy, extremely difficult, formally undecidable. (2. Lower bounds on
computational power) More energy ``='' more computational power. For example,
certain gate sets allow poly-time bosonic computations to simulate PTOWER, the
set of deterministic computations whose runtime scales as a tower of
exponentials with polynomial height. Even just exponential energy and $O(1)$
modes suffice to simulate NP, which, importantly, is a setup similar to that of
the recent bosonic factoring algorithm of [Brenner, Caha, Coiteux-Roy and
Koenig (2024)]. For simpler gate sets, we show an energy hierarchy theorem. (3.
Upper bounds on computational power) Bosonic computations with polynomial
energy can be simulated in BQP, ``physical'' bosonic computations with
arbitrary finite energy are decidable, and the gate set consisting of Gaussian
gates and the cubic phase gate can be simulated in PP, with exponential bound
on energy, improving upon the previous PSPACE upper bound. Finally, combining
upper and lower bounds yields no-go theorems for a continuous-variable
Solovay--Kitaev theorem for gate sets such as the Gaussian and cubic phase
gates.}},
author = {{Chabaud, Ulysse and Gharibian, Sevag and Mehraban, Saeed and Motamedi, Arsalan and Naeij, Hamid Reza and Rudolph, Dorian and Sambrani, Dhruva}},
booktitle = {{arXiv:2510.08545}},
title = {{{Energy, Bosons and Computational Complexity}}},
year = {{2025}},
}
@unpublished{60432,
abstract = {{The Quantum k-SAT problem is the quantum generalization of the k-SAT problem.
It is the problem whether a given local Hamiltonian is frustration-free.
Frustration-free means that the ground state of the k-local Hamiltonian
minimizes the energy of every local interaction term simultaneously. This is a
central question in quantum physics and a canonical QMA_1-complete problem. The
Quantum k-SAT problem is not as well studied as the classical k-SAT problem in
terms of special tractable cases, approximation algorithms and parameterized
complexity. In this paper, we will give a graph-theoretic study of the Quantum
k-SAT problem with the structures core and radius. These hypergraph structures
are important to solve the Quantum k-SAT problem. We can solve a Quantum k-SAT
instance in polynomial time if the derived hypergraph has a core of size n-m+a,
where a is a constant, and the radius is at most logarithmic. If it exists, we
can find a core of size n-m+a with the best possible radius in polynomial time,
whereas finding a general minimum core with minimal radius is NP-hard.}},
author = {{Kremer, Simon-Luca and Rudolph, Dorian and Gharibian, Sevag}},
booktitle = {{arXiv:2506.17066}},
title = {{{Quantum k-SAT Related Hypergraph Problems}}},
year = {{2025}},
}
@inbook{63439,
author = {{Moritzer, Elmar and Brandes, Philipp and Claes, Leander and Henning, Bernd}},
booktitle = {{PIAE EUROPE 2025}},
editor = {{Wissensforum GmbH, VDI}},
pages = {{347–360}},
publisher = {{{VDI Verlag}}},
title = {{{Ultrasound based measurement of mechanical properties of continuous fiber reinforced thermoplastic laminates – A non-destructive method to identify changes in fiber matrix adhesion}}},
doi = {{10.51202/9783181024461-347}},
year = {{2025}},
}
@article{63440,
author = {{Moritzer, Elmar and Brandes, Philipp and Westphal, Max Siegfried and Claes, Leander and Wippermann, Mareen and Düchting, Julia and Henning, Bernd}},
journal = {{WAK Jahresmagazin}},
keywords = {{Faser-Kunststoff-Verbunde (FKV), Faserverstärkte Kunststoffe (FVK), Organobleche, Ultraschall}},
pages = {{26–29}},
title = {{{Zerstörungsfreie Ultraschall-Prüfung von Organoblechen}}},
volume = {{2025}},
year = {{2025}},
}
@inbook{64988,
author = {{Meyer, Anja and Dehn, Freya and Gövert, Andre and Schlegel-Matthies, Kirsten and Niederhaus, Constanze}},
booktitle = {{Sprache(n) im Beruf: Gestaltung und Förderung beruflicher Sprachbildung an den verschiedenen Lernorten.}},
editor = {{Gerholz, Karl-Heinz and Hochleitner, Thomas and Maidanjuk, Ilona and Beil, Shaleen Beil}},
pages = {{169--186}},
title = {{{Professionalisierung (angehender) Lehrkräfte für sprachbildenden Fachunterricht im Berufsfeld Ernährung und Hauswirtschaft mittels OER-Lektionen.}}},
year = {{2025}},
}
@inproceedings{61256,
author = {{Illian, Marvin and Luchterhandt, Björn and Wang, Lin}},
booktitle = {{Proceedings of the 20th Workshop on Mobility in the Evolving Internet Architecture (MobiArch)}},
location = {{Hong Kong, China}},
title = {{{Band Switching for Mobile Energy Optimization in 5G Networks and Beyond}}},
doi = {{10.1145/3737897.3767294}},
year = {{2025}},
}
@techreport{62284,
author = {{Kundisch, Dennis}},
pages = {{27 -- 28}},
title = {{{DFG fördert Forschungsprojekt - klare Wissensstrukturen in der Wirtschaftsinformatik}}},
volume = {{3}},
year = {{2025}},
}
@article{59531,
author = {{Ahmadi, Mehdi and Knorr, Lukas and Meschede, Henning}},
issn = {{0960-1481}},
journal = {{Renewable Energy}},
publisher = {{Elsevier BV}},
title = {{{Improvement of Wind Power Utilization Through Flexible Operation of Data Center in Wind Parks}}},
doi = {{10.1016/j.renene.2025.123073}},
year = {{2025}},
}
@inproceedings{65663,
author = {{Prina, Matteo Giacomo and Knorr, Lukas and Schlosser, Florian and Meschede, Henning and Misconel Schreiber, Steffi and Manepace, Andrea and Sparber, Wolfram}},
location = {{Dubrovnik}},
publisher = {{SDEWES}},
title = {{{Graph Neural Network Surrogates for Uncertainty Quantification in Multi-Node Energy System modeling}}},
year = {{2025}},
}
@article{65669,
abstract = {{Local droplet etching and subsequent refilling enables the fabrication of highly symmetric quantum dots with low fine structure splitting, suitable for generating polarization entangled photons. While well established in GaAs/AlxGa1−xAs, this approach does not yield emission in the telecom bands required for low loss fiber-based quantum communication. To achieve emission at 1.55 μm, local droplet etching must be adapted to alternative material platforms such as InP. Here, we systematically investigate how the etching material deposition rate and etching time influence nanohole morphology in In0.52Al0.48As layers lattice-matched to InP. In the first experiment, InAl was deposited at fluxes of 0.2–4.0 Å s−1 at Tetch = 350 °C and 460 °C. Lower fluxes produced nanoholes with lower density and larger ring diameters, indicating fewer and larger initial droplets, consistent with scaling theory. The average nanohole diameter decreased monotonically with increasing flux, whereas the average depth showed no clear dependence on flux. In the second experiment, etching times of 30–600 s were tested for InAl, In, and Al droplets. Average nanohole diameters remained constant for Al across all etching times, but decreased for In and InAl with increasing etching time, suggesting sidewall redeposition during etching. For all droplet types, depths peaked at intermediate times and decreased for prolonged etching, consistent with material diffusion into the nanohole after droplet consumption.}},
author = {{Deutsch, Dennis and Reuter, Dirk}},
issn = {{2073-4352}},
journal = {{Crystals}},
number = {{11}},
publisher = {{MDPI AG}},
title = {{{Influence of the Etching Material Deposition Rate and Annealing Time on Nanohole Morphology Etched into InP/In0.52Al0.48As Layers via Local Droplet Epitaxy}}},
doi = {{10.3390/cryst15110913}},
volume = {{15}},
year = {{2025}},
}