@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{57862,
  abstract     = {{The latest applications in ultrafast quantum metrology require bright, broadband bi-photon sources with one of the photons in the mid-infrared and the other in the visible to near infrared. However, existing sources based on bulk crystals are limited in brightness due to the short interaction length and only allow for limited dispersion engineering. Here, we present an integrated PDC source based on a Ti:LiNbO3 waveguide that generates broadband bi-photons with central wavelengths at 860 nm and 2800 nm. Their spectral bandwidth exceeds 25 THz and is achieved by simultaneous matching of the group velocities (GVs) and cancellation of GV dispersion for the signal and idler field. We provide an intuitive understanding of the process by studying our source’s behavior at different temperatures and pump wavelengths, which agrees well with simulations.}},
  author       = {{Roeder, Franz and Gnanavel, Abira and Pollmann, René and Brecht, Olga and Stefszky, Michael and Padberg, Laura and Eigner, Christof and Silberhorn, Christine and Brecht, Benjamin}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  number       = {{12}},
  publisher    = {{IOP Publishing}},
  title        = {{{Ultra-broadband non-degenerate guided-wave bi-photon source in the near and mid-infrared}}},
  doi          = {{10.1088/1367-2630/ad9f98}},
  volume       = {{26}},
  year         = {{2024}},
}

@article{37318,
  abstract     = {{<jats:title>Abstract</jats:title>
               <jats:p>The interaction between quantum light and matter is being intensively studied for systems that are enclosed in high-<jats:italic>Q</jats:italic> cavities which strongly enhance the light–matter coupling. Cavities with low <jats:italic>Q</jats:italic>-factors are generally given less attention due to their high losses that quickly destroy quantum systems. However, bad cavities can be utilized for several applications, where lower <jats:italic>Q</jats:italic>-factors are required, e.g., to increase the spectral width of the cavity mode. In this work, we demonstrate that low-<jats:italic>Q</jats:italic> cavities can be beneficial for preparing specific electronic steady states when certain quantum states of light are applied. We investigate the interaction between quantum light with various statistics and matter represented by a Λ-type three-level system in lossy cavities, assuming that cavity losses are the dominant loss mechanism. We show that cavity losses lead to non-trivial electronic steady states that can be controlled by the loss rate and the initial statistics of the quantum fields. We discuss the mechanism of the formation of such steady states on the basis of the equations of motion and present both analytical expressions and numerical simulations for such steady states.</jats:p>}},
  author       = {{Rose, Hendrik and Tikhonova, O V and Meier, Torsten and Sharapova, Polina}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  keywords     = {{General Physics and Astronomy}},
  number       = {{6}},
  publisher    = {{IOP Publishing}},
  title        = {{{Steady states of Λ-type three-level systems excited by quantum light with various photon statistics in lossy cavities}}},
  doi          = {{10.1088/1367-2630/ac74d8}},
  volume       = {{24}},
  year         = {{2022}},
}

@article{22259,
  author       = {{Roman-Rodriguez, V and Brecht, Benjamin and Srinivasan, K and Silberhorn, Christine and Treps, N and Diamanti, E and Parigi, V}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  title        = {{{Continuous variable multimode quantum states via symmetric group velocity matching}}},
  doi          = {{10.1088/1367-2630/abef96}},
  volume       = {{23}},
  year         = {{2021}},
}

@article{22770,
  author       = {{Gil López, Jano and Santandrea, Matteo and Roland, Ganaël and Brecht, Benjamin and Eigner, Christof and Ricken, Raimund and Quiring, Viktor and Silberhorn, Christine}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  title        = {{{Improved non-linear devices for quantum applications}}},
  doi          = {{10.1088/1367-2630/ac09fd}},
  year         = {{2021}},
}

@article{23473,
  author       = {{Belobo, Didier Belobo and Meier, Torsten}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  title        = {{{Approximate nonlinear wave solutions of the coupled two-component Gross–Pitaevskii equations with spin–orbit interaction}}},
  doi          = {{10.1088/1367-2630/abf3ed}},
  volume       = {{23}},
  year         = {{2021}},
}

@article{25038,
  author       = {{Massaro, Marcello and Meyer-Scott, Evan and Montaut, Nicola and Herrmann, Harald and Silberhorn, Christine}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  title        = {{{Improving SPDC single-photon sources via extended heralding and feed-forward control}}},
  doi          = {{10.1088/1367-2630/ab1ec3}},
  year         = {{2019}},
}

@article{19513,
  author       = {{Ma, Xuekai and Kartashov, Yaroslav Y and Gao, Tingge and Schumacher, Stefan}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  keywords     = {{pc2-ressources}},
  title        = {{{Controllable high-speed polariton waves in a PT-symmetric lattice}}},
  doi          = {{10.1088/1367-2630/ab5a9b}},
  year         = {{2019}},
}

@article{26226,
  author       = {{Santandrea, Matteo and Stefszky, Michael and Ansari, Vahid and Silberhorn, Christine}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  title        = {{{Fabrication limits of waveguides in nonlinear crystals and their impact on quantum optics applications}}},
  doi          = {{10.1088/1367-2630/aaff13}},
  year         = {{2019}},
}

@article{26508,
  author       = {{Nitsche, Thomas and Geib, Tobias and Stahl, Christoph and Lorz, Lennart and Cedzich, Christopher and Barkhofen, Sonja and Werner, Reinhard F and Silberhorn, Christine}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  title        = {{{Eigenvalue measurement of topologically protected edge states in split-step quantum walks}}},
  doi          = {{10.1088/1367-2630/ab12fa}},
  year         = {{2019}},
}

@article{26224,
  author       = {{Santandrea, Matteo and Stefszky, Michael and Roeland, Ganaël and Silberhorn, Christine}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  title        = {{{Characterisation of fabrication inhomogeneities in Ti:LiNbO3 waveguides}}},
  doi          = {{10.1088/1367-2630/ab5cb5}},
  year         = {{2019}},
}

@article{15851,
  author       = {{Ma, Xuekai and Kartashov, Yaroslav Y and Gao, Tingge and Schumacher, Stefan}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  title        = {{{Controllable high-speed polariton waves in a PT-symmetric lattice}}},
  doi          = {{10.1088/1367-2630/ab5a9b}},
  volume       = {{21}},
  year         = {{2019}},
}

@article{9828,
  author       = {{Tiedau, J and Shchesnovich, V S and Mogilevtsev, D and Ansari, V and Harder, G and Bartley, Tim and Korolkova, N and Silberhorn, Christine}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  title        = {{{Quantum state and mode profile tomography by the overlap}}},
  doi          = {{10.1088/1367-2630/aaad8a}},
  year         = {{2018}},
}

@article{6540,
  abstract     = {{Coherent phonons can greatly vary light–matter interaction in semiconductor nanostructures placed inside an optical resonator on a picosecond time scale. For an ensemble of quantum dots (QDs) as active laser medium, phonons are able to induce a large enhancement or attenuation of the emission intensity, as has been recently demonstrated. The physics of this coupled phonon–exciton–light system consists of various effects, which in the experiment typically cannot be clearly separated, in particular, due to the complicated sample structure a rather complex strain pulse impinges on the QD ensemble. Here we present a comprehensive theoretical study how the laser emission is affected by phonon pulses of various shapes as well as by ensembles with different spectral distributions of the QDs. This gives insight into the fundamental interaction dynamics of the coupled phonon–exciton–light system, while it allows us to clearly discriminate between two prominent effects: the adiabatic shifting of the ensemble and the shaking effect. This paves the way to a tailored laser emission controlled by phonons.}},
  author       = {{Wigger, Daniel and Czerniuk, Thomas and Reiter, Doris E and Bayer, Manfred and Kuhn, Tilmann}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  number       = {{7}},
  publisher    = {{IOP Publishing}},
  title        = {{{Systematic study of the influence of coherent phonon wave packets on the lasing properties of a quantum dot ensemble}}},
  doi          = {{10.1088/1367-2630/aa78bf}},
  volume       = {{19}},
  year         = {{2017}},
}

@article{38056,
  author       = {{Mogilevtsev, D and Teo, Y S and Řeháček, J and Hradil, Z and Tiedau, J and Kruse, R and Harder, G and Silberhorn, Christine and Sanchez-Soto, L L}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  keywords     = {{General Physics and Astronomy}},
  number       = {{9}},
  publisher    = {{IOP Publishing}},
  title        = {{{Extracting the physical sector of quantum states}}},
  doi          = {{10.1088/1367-2630/aa81b3}},
  volume       = {{19}},
  year         = {{2017}},
}

@article{13906,
  author       = {{Sharapova, Polina and Luo, Kai Hong and Herrmann, Harald and Reichelt, Matthias and Meier, Torsten and Silberhorn, Christine}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  number       = {{12}},
  publisher    = {{IOP Publishing}},
  title        = {{{Toolbox for the design of LiNbO3-based passive and active integrated quantum circuits}}},
  doi          = {{10.1088/1367-2630/aa9033}},
  volume       = {{19}},
  year         = {{2017}},
}

@article{26061,
  author       = {{Sharapova, Polina and Luo, Kai Hong and Herrmann, Harald and Reichelt, Matthias and Meier, Torsten and Silberhorn, Christine}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  number       = {{12}},
  publisher    = {{IOP Publishing}},
  title        = {{{Toolbox for the design of LiNbO3-based passive and active integrated quantum circuits}}},
  doi          = {{10.1088/1367-2630/aa9033}},
  volume       = {{19}},
  year         = {{2017}},
}

@article{63737,
  author       = {{Thomas, S E and Munns, J H D and Kaczmarek, K T and Qiu, C and Brecht, Benjamin and Feizpour, A and Ledingham, P M and Walmsley, I A and Nunn, J and Saunders, D J}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  number       = {{6}},
  publisher    = {{IOP Publishing}},
  title        = {{{High efficiency Raman memory by suppressing radiation trapping}}},
  doi          = {{10.1088/1367-2630/aa7534}},
  volume       = {{19}},
  year         = {{2017}},
}

@article{26510,
  author       = {{Hamilton, Craig S and Barkhofen, Sonja and Sansoni, Linda and Jex, Igor and Silberhorn, Christine}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  title        = {{{Driven discrete time quantum walks}}},
  doi          = {{10.1088/1367-2630/18/7/073008}},
  year         = {{2016}},
}

@article{26519,
  author       = {{Nitsche, Thomas and Elster, Fabian and Novotný, Jaroslav and Gábris, Aurél and Jex, Igor and Barkhofen, Sonja and Silberhorn, Christine}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  title        = {{{Quantum walks with dynamical control: graph engineering, initial state preparation and state transfer}}},
  doi          = {{10.1088/1367-2630/18/6/063017}},
  year         = {{2016}},
}