@misc{54405,
  abstract     = {{Dataset of the publication "Microscopic simulations of the dynamics of excitonic many-body correlations coupled to quantum light" H. Rose, P. R. Sharapova, and T. Meier, Proc. SPIE 12884, Ultrafast Phenomena and Nanophotonics XXVIII, 1288403 (2024). ( https://doi.org/10.1117/12.2690245 ). The zip file includes the data on which the plots shown in figures 1 and 2 are based.}},
  author       = {{Rose, Hendrik and Sharapova, Polina and Meier, Torsten}},
  publisher    = {{LibreCat University}},
  title        = {{{Microscopic simulations of the dynamics of excitonic many-body correlations coupled to quantum light}}},
  doi          = {{10.5281/ZENODO.10817980}},
  year         = {{2024}},
}

@inproceedings{55268,
  author       = {{Rose, Hendrik and Sharapova, Polina R. and Meier, Torsten}},
  booktitle    = {{Ultrafast Phenomena and Nanophotonics XXVIII}},
  editor       = {{Betz, Markus and Elezzabi, Abdulhakem Y.}},
  publisher    = {{SPIE}},
  title        = {{{Microscopic simulations of the dynamics of excitonic many-body correlations coupled to quantum light}}},
  doi          = {{10.1117/12.2690245}},
  year         = {{2024}},
}

@article{57410,
  author       = {{Röder, J. and Gerhard, M. and Fuchs, C. and Stolz, W. and Heimbrodt, W. and Koch, M. and Ngo, C. and Steiner, J. T. and Meier, Torsten}},
  issn         = {{2469-9950}},
  journal      = {{Physical Review B}},
  number       = {{19}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Charge transfer magnetoexcitons in magnetoabsorption spectra of asymmetric type-II double quantum wells}}},
  doi          = {{10.1103/physrevb.110.195306}},
  volume       = {{110}},
  year         = {{2024}},
}

@article{57743,
  author       = {{Krishnaswamy, Suchitra and Schlue, Fabian and Ares, L. and Dyachuk, V. and Stefszky, Michael and Brecht, Benjamin and Silberhorn, Christine and Sperling, Jan}},
  issn         = {{2469-9926}},
  journal      = {{Physical Review A}},
  number       = {{2}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Experimental retrieval of photon statistics from click detection}}},
  doi          = {{10.1103/physreva.110.023717}},
  volume       = {{110}},
  year         = {{2024}},
}

@article{57839,
  abstract     = {{<jats:title>Abstract</jats:title>
               <jats:p>Experiments with ultracold atoms in optical lattices usually involve a weak parabolic trapping potential which merely serves to confine the atoms, but otherwise remains negligible. In contrast, we suggest a different class of experiments in which the presence of a stronger trap is an essential part of the set-up. Because the trap-modified on-site energies exhibit a slowly varying level spacing, similar to that of an anharmonic oscillator, an additional time-periodic trap modulation with judiciously chosen parameters creates nonlinear resonances which enable efficient Floquet engineering. We employ a Mathieu approximation for constructing the near-resonant Floquet states in an accurate manner and demonstrate the emergence of effective ground states from the resonant trap eigenstates. Moreover, we show that the population of the Floquet states is strongly affected by the phase of a sudden turn-on of the trap modulation, which leads to significantly modified and rich dynamics. As a guideline for further studies, we argue that the deliberate population of only the resonance-induced effective ground states will allow one to realize Floquet condensates which follow classical periodic orbits, thus providing challenging future perspectives for the investigation of the quantum–classical correspondence.</jats:p>}},
  author       = {{Ali, Usman and Holthaus, Martin and Meier, Torsten}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  number       = {{12}},
  publisher    = {{IOP Publishing}},
  title        = {{{Floquet dynamics of ultracold atoms in optical lattices with a parametrically modulated trapping potential}}},
  doi          = {{10.1088/1367-2630/ad9b47}},
  volume       = {{26}},
  year         = {{2024}},
}

@article{61251,
  abstract     = {{<jats:p>We theoretically investigate strategies for the deterministic creation of trains of time-bin entangled photons using an individual quantum emitter described by a Λ-type electronic system. We explicitly demonstrate the theoretical generation of linear cluster states with substantial numbers of entangled photonic qubits in full microscopic numerical simulations. The underlying scheme is based on the manipulation of ground state coherences through precise optical driving. One important finding is that the most easily accessible quality metrics, the achievable rotation fidelities, fall short in assessing the actual quantum correlations of the emitted photons in the face of losses. To address this, we explicitly calculate stabilizer generator expectation values as a superior gauge for the quantum properties of the generated many-photon state. With widespread applicability in other emitter and excitation–emission schemes also, our work lays the conceptual foundations for an in-depth practical analysis of time-bin entanglement based on full numerical simulations with predictive capabilities for realistic systems and setups, including losses and imperfections. The specific results shown in the present work illustrate that with controlled minimization of losses and realistic system parameters for quantum-dot type systems, useful linear cluster states of significant lengths can be generated in the calculations, discussing the possibility of scalability for quantum information processing endeavors.</jats:p>}},
  author       = {{Bauch, David and Köcher, Nikolas and Heinisch, Nils and Schumacher, Stefan}},
  issn         = {{2835-0103}},
  journal      = {{APL Quantum}},
  number       = {{3}},
  publisher    = {{AIP Publishing}},
  title        = {{{Time-bin entanglement in the deterministic generation of linear photonic cluster states}}},
  doi          = {{10.1063/5.0214197}},
  volume       = {{1}},
  year         = {{2024}},
}

@article{61250,
  author       = {{Bennenhei, Christoph and Shan, Hangyong and Struve, Marti and Kunte, Nils and Eilenberger, Falk and Ohmer, Jürgen and Fischer, Utz and Schumacher, Stefan and Ma, Xuekai and Schneider, Christian and Esmann, Martin}},
  issn         = {{2330-4022}},
  journal      = {{ACS Photonics}},
  number       = {{8}},
  pages        = {{3046--3054}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Organic Room-Temperature Polariton Condensate in a Higher-Order Topological Lattice}}},
  doi          = {{10.1021/acsphotonics.4c00268}},
  volume       = {{11}},
  year         = {{2024}},
}

@article{61253,
  abstract     = {{<jats:p>In the SUPER scheme (Swing-UP of the quantum EmitteR population), excitation of a quantum emitter is achieved with two off-resonant, red-detuned laser pulses. This allows the generation of high-quality single photons without the need of complex laser stray light suppression or careful spectral filtering. In the present work, we extend this promising method to quantum emitters, specifically semiconductor quantum dots, inside a resonant optical cavity. A significant advantage of the SUPER scheme is identified in that it eliminates re-excitation of the quantum emitter by suppressing photon emission during the excitation cycle. This, in turn, leads to almost ideal single-photon purity, overcoming a major factor typically limiting the quality of photons generated with quantum emitters in high-quality cavities. We further find that for cavity-mediated biexciton emission of degenerate photon pairs, the SUPER scheme leads to near-perfect biexciton initialization with very high values of polarization entanglement of emitted photon pairs.</jats:p>
          <jats:sec>
            <jats:title/>
            <jats:supplementary-material>
              <jats:permissions>
                <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement>
                <jats:copyright-year>2024</jats:copyright-year>
              </jats:permissions>
            </jats:supplementary-material>
          </jats:sec>}},
  author       = {{Heinisch, Nils and Köcher, Nikolas and Bauch, David and Schumacher, Stefan}},
  issn         = {{2643-1564}},
  journal      = {{Physical Review Research}},
  number       = {{1}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Swing-up dynamics in quantum emitter cavity systems: Near ideal single photons and entangled photon pairs}}},
  doi          = {{10.1103/physrevresearch.6.l012017}},
  volume       = {{6}},
  year         = {{2024}},
}

@article{61255,
  abstract     = {{<jats:title>Abstract</jats:title>
               <jats:p>Topological states have been widely investigated in different types of systems and lattices. In the present work, we report on topological edge states in double-wave (DW) chains, which can be described by a generalized Aubry-André-Harper (AAH) model. For the specific system of a driven-dissipative exciton polariton system we show that in such potential chains, different types of edge states can form. For resonant optical excitation, we further find that the optical nonlinearity leads to a multistability of different edge states. This includes topologically protected edge states evolved directly from individual linear eigenstates as well as additional edge states that originate from nonlinearity-induced localization of bulk states. Extending the system into two dimensions (2D) by stacking horizontal DW chains in the vertical direction, we also create 2D multi-wave lattices. In such 2D lattices multiple Su–Schrieffer–Heeger (SSH) chains appear along the vertical direction. The combination of DW chains in the horizonal and SSH chains in the vertical direction then results in the formation of higher-order topological insulator corner states. Multistable corner states emerge in the nonlinear regime.</jats:p>}},
  author       = {{Schneider, Tobias and Gao, Wenlong and Zentgraf, Thomas and Schumacher, Stefan and Ma, Xuekai}},
  issn         = {{2192-8614}},
  journal      = {{Nanophotonics}},
  number       = {{4}},
  pages        = {{509--518}},
  publisher    = {{Walter de Gruyter GmbH}},
  title        = {{{Topological edge and corner states in coupled wave lattices in nonlinear polariton condensates}}},
  doi          = {{10.1515/nanoph-2023-0556}},
  volume       = {{13}},
  year         = {{2024}},
}

@article{61257,
  abstract     = {{<jats:p>Exceptional points (EPs), with their intriguing spectral topology, have attracted considerable attention in a broad range of physical systems, with potential sensing applications driving much of the present research in this field. Here, we investigate spectral topology and EPs in systems with significant nonlinearity, exemplified by a nonequilibrium exciton-polariton condensate. With the possibility to control loss and gain and nonlinearity by optical means, this system allows for a comprehensive analysis of the interplay of nonlinearities (Kerr type and saturable gain) and non-Hermiticity. Not only do we find that EPs can be intentionally shifted in parameter space by the saturable gain, but we also observe intriguing rotations and intersections of Riemann surfaces and find nonlinearity-enhanced sensing capabilities. With this, our results illustrate the potential of tailoring spectral topology and related phenomena in non-Hermitian systems by nonlinearity.</jats:p>
          <jats:sec>
            <jats:title/>
            <jats:supplementary-material>
              <jats:permissions>
                <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement>
                <jats:copyright-year>2024</jats:copyright-year>
              </jats:permissions>
            </jats:supplementary-material>
          </jats:sec>}},
  author       = {{Wingenbach, Jan and Schumacher, Stefan and Ma, Xuekai}},
  issn         = {{2643-1564}},
  journal      = {{Physical Review Research}},
  number       = {{1}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Manipulating spectral topology and exceptional points by nonlinearity in non-Hermitian polariton systems}}},
  doi          = {{10.1103/physrevresearch.6.013148}},
  volume       = {{6}},
  year         = {{2024}},
}

@article{61258,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>Thermal stability is crucial for doped organic semiconductors (OSCs) and their applications in organic thermoelectric (OTE) devices. However, the capacity of n‐dopants to produce thermally stable n‐doped OSC films has not been thoroughly explored, with few reports of high thermal stability. Here, a novel n‐dopant, phosphazenium tetrafluoroborate (P<jats:sub>2</jats:sub>BF<jats:sub>4</jats:sub>) is introduced, which effectively induces n‐doping in N2200, P(PzDPP‐CT2) and several other commonly used OSCs. Remarkably, the electrical conductivity of P<jats:sub>2</jats:sub>BF<jats:sub>4</jats:sub>‐doped OSC films remains almost unchanged even after heating at temperatures &gt; 150 °C for 24 h, far superior to the films doped with benchmark N‐DMBI. The exceptional thermal stability observed in P<jats:sub>2</jats:sub>BF<jats:sub>4</jats:sub>‐doped P(PzDPP‐CT2) films allows for stable operation of the corresponding organic thermoelectric devices at 150 °C for 16 h, a milestone not previously achieved. This study offers valuable insights into the development of n‐dopants capable of producing OSCs with outstanding thermal stability, paving the way for the practical realization of OTE devices with enhanced operation stability.</jats:p>}},
  author       = {{Wei, Huan and Guo, Jing and Liu, Heng and Wu, Tong and Chen, Ping‐An and Dong, Chuanding and Wang, Shu‐Jen and Schumacher, Stefan and Bai, Yugang and Lei, Ting and Wang, Suhao and Hu, Yuanyuan}},
  issn         = {{2199-160X}},
  journal      = {{Advanced Electronic Materials}},
  publisher    = {{Wiley}},
  title        = {{{Novel Phosphazenium Tetrafluoroborate Dopant Enables Efficient and Thermally Stable n‐Doped Organic Semiconductors}}},
  doi          = {{10.1002/aelm.202400767}},
  year         = {{2024}},
}

@article{61259,
  author       = {{Bauch, Fabian and Dong, Chuan-Ding and Schumacher, Stefan}},
  issn         = {{1932-7447}},
  journal      = {{The Journal of Physical Chemistry C}},
  number       = {{8}},
  pages        = {{3525--3532}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Dynamics of Electron–Hole Coulomb Attractive Energy and Dipole Moment of Hot Excitons in Donor–Acceptor Polymers}}},
  doi          = {{10.1021/acs.jpcc.3c07513}},
  volume       = {{128}},
  year         = {{2024}},
}

@article{61263,
  abstract     = {{<jats:p>Charge transfer mechanism in the deprotonation-induced n-type doping of PCBM.</jats:p>}},
  author       = {{Dong, Chuan-Ding and Bauch, Fabian and Hu, Yuanyuan and Schumacher, Stefan}},
  issn         = {{1463-9076}},
  journal      = {{Physical Chemistry Chemical Physics}},
  number       = {{5}},
  pages        = {{4194--4199}},
  publisher    = {{Royal Society of Chemistry (RSC)}},
  title        = {{{Charge transfer in superbase n-type doping of PCBM induced by deprotonation}}},
  doi          = {{10.1039/d3cp05105f}},
  volume       = {{26}},
  year         = {{2024}},
}

@article{61261,
  author       = {{Liang, Qian and Ma, Xuekai and Gu, Chunling and Ren, Jiahuan and An, Cunbin and Fu, Hongbing and Schumacher, Stefan and Liao, Qing}},
  issn         = {{0002-7863}},
  journal      = {{Journal of the American Chemical Society}},
  number       = {{7}},
  pages        = {{4542--4548}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Photochemical Reaction Enabling the Engineering of Photonic Spin–Orbit Coupling in Organic-Crystal Optical Microcavities}}},
  doi          = {{10.1021/jacs.3c11373}},
  volume       = {{146}},
  year         = {{2024}},
}

@article{61357,
  author       = {{Krenz, Marvin and Sanna, Simone and Gerstmann, Uwe and Schmidt, Wolf Gero}},
  issn         = {{1932-7447}},
  journal      = {{The Journal of Physical Chemistry C}},
  number       = {{41}},
  pages        = {{17774--17778}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Understanding and Improving Triplet Exciton Transfer in Sensitized Silicon Solar Cells}}},
  doi          = {{10.1021/acs.jpcc.4c05446}},
  volume       = {{128}},
  year         = {{2024}},
}

@inbook{62916,
  author       = {{Zhang, Hongdan and Zuo, Ruixin and Yang, Shidong and Trautmann, Alexander and Song, Xiaohong and Meier, Torsten and Yang, Weifeng}},
  booktitle    = {{High-Order Harmonic Generation in Solids}},
  isbn         = {{9789811279553}},
  publisher    = {{WORLD SCIENTIFIC}},
  title        = {{{Analyzing High-Order Harmonic Generation in Solids Based on Semi-Classical Recollision Models}}},
  doi          = {{10.1142/9789811279560_0006}},
  year         = {{2024}},
}

@inbook{62917,
  author       = {{Reichelt, Matthias and Zuo, Ruixin and Song, Xiaohong and Yang, Weifeng and Meier, Torsten}},
  booktitle    = {{High-Order Harmonic Generation in Solids}},
  isbn         = {{9789811279553}},
  publisher    = {{WORLD SCIENTIFIC}},
  title        = {{{High-Order Harmonic Generation in Semiconductors with Excitonic Effects}}},
  doi          = {{10.1142/9789811279560_0009}},
  year         = {{2024}},
}

@misc{62915,
  author       = {{Meier, Torsten and Ali, Usman and Holthaus, Martin}},
  publisher    = {{LibreCat University}},
  title        = {{{Floquet dynamics of ultracold atoms in optical lattices with a parametrically modulated trapping potential}}},
  doi          = {{10.5281/ZENODO.11935146}},
  year         = {{2024}},
}

@article{61359,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>The current efficiency records for generating green hydrogen via solar water splitting are held by indium phosphide (InP)‐based photo‐absorbers, protected by TiO<jats:sub>2</jats:sub> layers grown through atomic layer deposition (ALD). InP is also a leading material for photonic integrated circuits and computing, where ultrafast near‐surface behavior is key. A previous study described electronic pathways at the phosphorus‐rich (P‐rich) surface of p‐doped InP(100) using time‐resolved two‐photon photoemission (tr‐2PPE) spectroscopy. Here, the intricate electron pathways of the P‐rich InP surface modified with ALD‐deposited TiO<jats:sub>2</jats:sub> are explored. Photoexcited bulk InP electrons migrate through a bulk‐to‐surface transition cluster of states and surface states and inject into the TiO<jats:sub>2</jats:sub> conduction band (CB). Energy levels and occupation dynamics of CB states in P‐rich InP and TiO<jats:sub>2</jats:sub> adlayers are observed, with discrete states preserved up to 10 nm TiO<jats:sub>2</jats:sub> deposition. Thermalization lifetimes of excited electrons &gt; 0.8 eV above the InP conduction band minimum (CBM) are preserved for layer thicknesses up to 2.5 nm. Annealing at 300 °C to achieve crystalline TiO<jats:sub>2</jats:sub> reconstructions destroys interfacial states, affecting charge transfer. These observations enable innovative engineering of the P‐rich InP/TiO<jats:sub>2</jats:sub> heterointerface, opening new possibilities for studying hot‐carrier extraction, adsorbate effects, surface plasmons, and improving photovoltaic and PEC water‐splitting devices.</jats:p>}},
  author       = {{Diederich, Jonathan and Rojas, Jennifer Velazquez and Paszuk, Agnieszka and Pour, Mohammad Amin Zare and Höhn, Christian and Alvarado, Isaac Azahel Ruiz and Schwarzburg, Klaus and Ostheimer, David and Eichberger, Rainer and Schmidt, Wolf Gero and Hannappel, Thomas and van de Krol, Roel and Friedrich, Dennis}},
  issn         = {{1616-301X}},
  journal      = {{Advanced Functional Materials}},
  number       = {{49}},
  publisher    = {{Wiley}},
  title        = {{{Ultrafast Electron Dynamics at the P‐rich Indium Phosphide/TiO<sub>2</sub> Interface}}},
  doi          = {{10.1002/adfm.202409455}},
  volume       = {{34}},
  year         = {{2024}},
}

@article{60581,
  abstract     = {{<jats:title>Abstract</jats:title>
               <jats:p>The natural band alignments between indium phosphide and the main dioxides of titanium, i.e. rutile, anatase, and brookite as well as amorphous titania are calculated from the branch-point energies of the respective materials. Irrespective of the titania polymorph considered, type-I band alignment is predicted. This may change, however, in dependence on the microscopic interface structure: supercell calculations for amorphous titania grown on P-rich InP(001) surfaces result in a titania conduction band that nearly aligns with that of InP. Depending on the interface specifics, both type-I band and type-II band alignments are observed in the simulations. This agrees with recent experimental findings.</jats:p>}},
  author       = {{Ruiz Alvarado, Isaac Azahel and Dreßler, Christian and Schmidt, Wolf Gero}},
  issn         = {{0953-8984}},
  journal      = {{Journal of Physics: Condensed Matter}},
  number       = {{7}},
  publisher    = {{IOP Publishing}},
  title        = {{{Band alignment at InP/TiO<sub>2</sub> interfaces from density-functional theory}}},
  doi          = {{10.1088/1361-648x/ad9725}},
  volume       = {{37}},
  year         = {{2024}},
}