• Ramsey interferometry with generalized one-axis twisting echoes 

  Schulte, Marius; Martínez-Lahuerta, Victor J. (Wien : Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften, 2020)

  We consider a large class of Ramsey interferometry protocols which are enhanced by squeezing and un-squeezing operations before and after a phase signal is imprinted on the collective spin of N particles. We report an ...
• Multi-frequency radiation of dissipative solitons in optical fiber cavities 

  Melchert, Oliver; Demircan, Ayhan; Yulin, Alexey (Washington, DC : American Association for the Advancement of Science, 2020)

  New resonant emission of dispersive waves by oscillating solitary structures in optical fiber cavities is considered analytically and numerically. The pulse propagation is described in the framework of the Lugiato-Lefever ...
• Towards a Better Representation of Fog Microphysics in Large-Eddy Simulations Based on an Embedded Lagrangian Cloud Model 

  Schwenkel, Johannes; Maronga, Björn (Basel : MDPI, 2020)

  The development of radiation fog is influenced by multiple physical processes such as radiative cooling and heating, turbulent mixing, and microphysics, which interact on different spatial and temporal scales with one ...
• Training deep quantum neural networks 

  Beer, Kerstin; Bondarenko, Dmytro; Farrelly, Terry; Osborne, Tobias J.; Salzmann, Robert; Scheiermann, Daniel; Wolf, Ramona (Berlin : Nature Research, 2020)

  Neural networks enjoy widespread success in both research and industry and, with the advent of quantum technology, it is a crucial challenge to design quantum neural networks for fully quantum learning tasks. Here we propose ...
• A synchronized VUV light source based on high-order harmonic generation at FLASH 

  Appi, Elisa; Papadopoulou, Christina C.; Mapa, Jose Louise; Wesavkar, Nishad; Jusko, Christoph; Mosel, Philip; Ališauskas, Skirmantas; Lang, Tino; Heyl, Christoph M.; Manschwetus, Bastian; Brachmanski, Maciej; Braune, Markus; Lindenblatt, Hannes; Trost, Florian; Meister, Severin; Schoch, Patrizia; Treusch, Rolf; Moshammer, Robert; Hartl, Ingmar; Morgner, Uwe; Kovacev, Milutin (Berlin : Nature Research, 2020)

  Ultrafast measurements in the extreme ultraviolet (XUV) spectral region targeting femtosecond timescales rely until today on two complementary XUV laser sources: free electron lasers (FELs) and high-harmonic generation ...
• Cloud detection based on high resolution stereo pairs of the geostationary meteosat images 

  Dehnavi, Sahar; Maghsoudi, Yasser; Zakšek, Klemen; Zoej, Mohammad Javad Valadan; Seckmeyer, Gunther; Skripachev, Vladimir (Basel : MDPI AG, 2020)

  Due to the considerable impact of clouds on the energy balance in the atmosphere and on the earth surface, they are of great importance for various applications in meteorology or remote sensing. An important aspect of the ...
• Frieze Patterns with Coefficients 

  Cuntz, Michael; Holm, Thorsten; JØrgensen, Peter (Cambridge : Cambridge University Press, 2020)

  Frieze patterns, as introduced by Coxeter in the 1970s, are closely related to cluster algebras without coefficients. A suitable generalization of frieze patterns, linked to cluster algebras with coefficients, has only ...
• Carrier-envelope offset frequency stabilization of a thin-disk laser oscillator via depletion modulation 

  Andrade, José R.C.; Modsching, Norbert; Tajalli, Ayhan; Dietrich, Christian M.; Kleinert, Sven; Placzek, Fabian; Kreipe, Bernhard; Schilt, Stephane; Wittwer, Valentin J.; Südmeyer, Thomas; Morgner, Uwe (Piscataway : Institute of Electrical and Electronics Engineers, 2020)

  We present a novel concept for the stabilization of the carrier-envelope offset (CEO) frequency of femtosecond pulse trains from thin-disk laser oscillators by exploiting gain depletion modulation in the active gain region. ...
• Integral points of bounded height via universal torsors 

  Wilsch, Florian (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2020)

  A conjecture of Manin’s relates the number of rational points of bounded height on Fano varieties with their geometric properties. Analogously to this conjecture on rational points, we study the distribution of integral ...
• Optimality conditions for abs-normal NLPs 

  Hegerhorst-Schultchen, Lisa Christine (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2020)

  Structured nonsmoothness is widely present in practical optimization problems. A particularly attractive class of nonsmooth problems, both from a theoretical and from an algorithmic perspective, are nonsmooth NLPs with ...
• Cubic fourfolds with ADE singularities and K3 surfaces 

  Stegmann, Ann-Kathrin (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2020)

  In this thesis, we will give a partial classification of cubic fourfolds by their isolated ADE singularities. We have a correspondence between cubic fourfolds and complete (2,3)- intersections in ℙ^4 having both certain ...
• On a three-dimensional model for MEMS with hinged boundary conditions 

  Nik, Katerina (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2020)

  We study a free boundary problem arising from the modeling of an idealized electrostatically actuated MEMS device. In contrast to existing literature, we consider a three-dimensional device involving a hinged elastic plate. ...
• Q`-cohomology projective planes and Enriques surfaces in characteristic two 

  Schütt, Matthias (s.l. : Association de l'Épijournal de Geometrie Algebrique, 2019)

  We classify singular Enriques surfaces in characteristic two supporting a rank nine configuration of smooth rational curves. They come in one-dimensional families defined over the prime field, paralleling the situation in ...
• Search for Eccentric Binary Black Hole Mergers with Advanced LIGO and Advanced Virgo during Their First and Second Observing Runs 

  Abbott, B.P.; Abbott, R.; Abbott, T.D.; Abraham, S.; Acernese, F.; Ackley, K.; Affeldt, C.; Aufmuth, P.; Bergmann, G.; Bisht, A.; Booker, P.; Brinkmann, M.; Cabero, M.; Danilishin, S.L.; Danzmann, K.; de Varona, O.; Hanke, M.M.; Hennig, J.; Heurs, M.; Hochheim, S.; Junker, J.; Kaufer, S.; Khan, S.; Kirchhoff, R.; Koehlenbeck, S.M.; Koper, N.; Krämer, C.; Kringel, V.; Kuehn, G.; Leavey, S.; Lehmann, J.; Lough, J.D.; Lück, H.; Mehmet, M.; Meylahn, F.; Mukherjee, A.; Mukund, N.; Nery, M.; Oppermann, P.; Phelps, M.; Rüdiger, A.; Schreiber, E.; Schulte, B.W.; Setyawati, Y.; Standke, M.; Steinke, M.; Steinmeyer, D.; Vahlbruch, H.; Wei, L.-W.; Weinert, M.; Wellmann, F.; Weßels, P.; Wilken, D.M.; Willke, B.; Winkler, W.; Wittel, H.; Woehler, J.; Wu, D.S.; et al. (Bristol : Institute of Physics Publishing, 2019)

  When formed through dynamical interactions, stellar-mass binary black holes (BBHs) may retain eccentric orbits (e > 0.1 at 10 Hz) detectable by ground-based gravitational-wave detectors. Eccentricity can therefore be ...
• High-efficiency squeezed light generation for gravitational wave detectors 

  Mehmet, M.; Vahlbruch, H. (Bristol : Institute of Physics Publishing, 2019)

  The engineering of strongly squeezed vacuum states of light is a key technology for the reduction of quantum noise in gravitational wave detectors. We report on the observation of up to 12.0 dB squeezed vacuum states of ...
• Low-latency Gravitational-wave Alerts for Multimessenger Astronomy during the Second Advanced LIGO and Virgo Observing Run 

  Abbott, B.P.; Abbott, R.; Abbott, T.D.; Abraham, S.; Acernese, F.; Ackley, K.; Adya, V.B.; Affeldt, C.; Aufmuth, P.; Bergmann, G.; Bisht, A.; Bode, N.; Booker, P.; Brinkmann, M.; Cabero, M.; Danilishin, S.L.; Danzmann, K.; Dent, T.; de Varona, O.; Doravari, S.; Hanke, M.M.; Heurs, M.; Hochheim, S.; Junker, J.; Kaufer, S.; Khan, S.; Kirchhoff, R.; Koch, P.; Koehlenbeck, S.M.; Koper, N.; Kringel, V.; Kuehn, G.; Leavey, S.; Lehmann, J.; Lough, J.D.; Lück, H.; Mehmet, M.; Mukherjee, A.; Nery, M.; Nitz, A.; Oppermann, P.; Phelps, M.; Puncken, O.; Rüdiger, A.; Schreiber, E.; Schulte, B.W.; Setyawati, Y.; Steinke, M.; Steinmeyer, D.; Thies, F.; Wei, L.-W.; Weinert, M.; Wellmann, F.; Weßels, P.; Wilken, D.M.; Willke, B.; Wimmer, M.H.; Winkler, W.; Wittel, H.; Woehler, J.; Wu, D.S.; et al. (Bristol : Institute of Physics Publishing, 2019)

  Advanced LIGO's second observing run (O2), conducted from 2016 November 30 to 2017 August 25, combined with Advanced Virgo's first observations in 2017 August, witnessed the birth of gravitational-wave multimessenger ...
• Ortsaufgelöste Analyse von Aktiniden mittels resonanter ToF-Laser-SNMS 

  Bosco, Hauke (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2020)

  Das vom Bundesministerium für Bildung und Forschung geförderte Forschungsprojekt Secondary Ionisation of Radioactive Isotopes for Ultra trace analysis with Spatial resolution (SIRIUS) zur Migration von Radionukliden aus ...
• New methods in stray light correction and multi-imaging spectroradiometry 

  Zuber, Ralf (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2020)

  Especially for measurements in the UV spectral range the internal stray light is often a crucial contribution to the measurement uncertainty for array spectroradiometers. In this work a technical procedure for significant ...
• Differential geometry of Hilbert schemes of curves in a projective space 

  Bielawski, Roger; Peternell, Carolin (Berlin : De Gruyter, 2019)

  We describe the natural geometry of Hilbert schemes of curves in and, in some cases, in , n ≥ 4.
• A Fermi Gamma-Ray Burst Monitor Search for Electromagnetic Signals Coincident with Gravitational-wave Candidates in Advanced LIGO's First Observing Run 

  Adya, V.B.; Affeldt, C.; Allen, B.; Aulbert, C.; Beer, C.; Bensch, M.; Bergmann, G.; Bisht, A.; Bock, O.; Bode, N.; Booker, P.; Brinkmann, M.; Cabero, M.; Capano, C.D.; Danilishin, S.L.; Danzmann, K.; Denker, T.; Dent, T.; Dergachev, V.; Varona, O.D.; Doravari, S.; Drago, M.; Dreissigacker, C.; Eggenstein, H.-B.; Fehrmann, H.; Hanke, M.M.; Heurs, M.; Hochheim, S.; Hofman, D.; Indik, N.; Junker, J.; Karvinen, K.S.; Kaufer, S.; Khan, S.; Kirchhoff, R.; Koch, P.; Koehlenbeck, S.M.; Kramer, C.; Kringel, V.; Krishnan, B.; Kuehn, G.; Leavey, S.; Lehmann, J.; Leonardi, M.; Lough, J.D.; Lück, H.; Lundgren, A.P.; Machenschalk, B.; Mehmet, M.; Mendoza-Gandara, D.; Milovich-Goff, M.C.; Ming, J.; Mukherjee, A.; Nery, M.; Nielsen, A.B.; Nitz, A.; Ohme, F.; Oppermann, P.; Papa, M.A.; Post, A.; Puncken, O.; Rüdiger, A.; Salemi, F.; Schreiber, E.; Schuette, D.; Schulte, B.W.; Schutz, B.F.; Setyawati, Y.; Singh, A.; Steinke, M.; Steinmeyer, D.; Steltner, B.; Theeg, T.; Thies, F.; Vahlbruch, H.; Walsh, S.; Wei, L.-W.; Weinert, M.; Wellmann, F.; Weßels, P.; Westerweck, J.; Wilken, D.; Willke, B.; Wimmer, M.H.; Winkler, W.; Wittel, H.; Woehler, J.; Wu, D.S.; Zhang, Y.-H.; Zhu, S.J.; et al. (The LIGO Scientific Collaboration and the Virgo Collaboration) (Bristol : Institute of Physics Publishing, 2019)

  We present a search for prompt gamma-ray counterparts to compact binary coalescence gravitational wave (GW) candidates from Advanced LIGO's first observing run (O1). As demonstrated by the multimessenger observations of ...

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