Browsing Fakultät für Mathematik und Physik by Title

Browsing Fakultät für Mathematik und Physik by Title

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  • Quantum technologies in space 
    Kaltenbaek, Rainer; Acin, Antonio; Bacsardi, Laszlo; Bianco, Paolo; Bouyer, Philippe; Diamanti, Eleni; Marquardt, Christoph; Omar, Yasser; Pruneri, Valerio; Rasel, Ernst M.; Sang, Bernhard; Seidel, Stephan; Ulbricht, Hendrik; Ursin, Rupert; Villoresi, Paolo; van den Bossche, Mathias; Klitzing, Wolf von; Zbinden, Hugo; Paternostro, Mauro; Bassi, Angelo (Dordrecht [u.a.] : Springer Science + Business Media B.V., 2021)
    Recently, the European Commission supported by many European countries has announced large investments towards the commercialization of quantum technology (QT) to address and mitigate some of the biggest challenges facing ...
  • The quantum technologies roadmap: A European community view 
    Acín, Antonio; Bloch, Immanuel; Buhrman, Harry; Calarco, Tommaso; Eichler, Christopher; Eisert, Jens; Esteve, Daniel; Gisin, Nicolas; Glaser, Steffen J.; Jelezko, Fedor; Kuhr, Stefan; Lewenstein, Maciej; Riedel, Max F.; Schmidt, Piet O.; Thew, Rob; Wallraff, Andreas; Walmsley, Ian; Wilhelm, Frank K. (Bristol : Institute of Physics Publishing, 2018)
    Within the last two decades, quantum technologies (QT) have made tremendous progress, moving from Nobel Prize award-winning experiments on quantum physics (1997: Chu, Cohen-Tanoudji, Phillips; 2001: Cornell, Ketterle, ...
  • Quantum teleportation in space and frequency using entangled pairs of photons from a frequency comb 
    Song, Hongbin; Yonezawa, Hidehiro; Kuntz, Katanya B.; Heurs, Michèle; Huntington, Elanor H. (College Park, MD : American Physical Society, 2014)
    Using entangled pairs of photons from a frequency comb and wide-band frequency-resolved homodyne detection, we propose a sequential quantum teleportation protocol for continuous variables that teleports an unknown state ...
  • Quantum test of the Universality of Free Fall using rubidium and potassium 
    Albers, Henning; Herbst, Alexander; Richardson, Logan L.; Heine, Hendrik; Nath, Dipankar; Hartwig, Jonas; Schubert, Christian; Vogt, Christian; Woltmann, Marian; Lämmerzahl, Claus; Herrmann, Sven; Ertmer, Wolfgang; Rasel, Ernst M.; Schlippert, Dennis (Berlin ; Heidelberg : Springer, 2020)
    We report on an improved test of the Universality of Free Fall using a rubidium-potassium dual-species matter wave interferometer. We describe our apparatus and detail challenges and solutions relevant when operating a ...
  • Quantum Variational Optimization of Ramsey Interferometry and Atomic Clocks 
    Kaubruegger, Raphael; Vasilyev, Denis V.; Schulte, Marius; Hammerer, Klemens; Zoller, Peter (College Park, Md. : APS, 2021)
    We discuss quantum variational optimization of Ramsey interferometry with ensembles of N entangled atoms, and its application to atomic clocks based on a Bayesian approach to phase estimation. We identify best input states ...
  • Quantum Walks with Nonorthogonal Position States 
    Matjeschk, R.; Ahlbrecht, Andre; Enderlein, M.; Cedzich, C.; Werner, A.H.; Keyl, M.; Schaetz, T.; Werner, R.F. (College Park, MD : American Physical Society, 2012)
    Quantum walks have by now been realized in a large variety of different physical settings. In some of these, particularly with trapped ions, the walk is implemented in phase space, where the corresponding position states ...
  • Quantum Walks: Schur Functions Meet Symmetry Protected Topological Phases 
    Cedzich, C.; Geib, T.; Grünbaum, F.A.; Velázquez, L.; Werner, A.H.; Werner, R.F. (Berlin ; Heidelberg : Springer, 2021)
    This paper uncovers and exploits a link between a central object in harmonic analysis, the so-called Schur functions, and the very hot topic of symmetry protected topological phases of quantum matter. This connection is ...
  • Quantum Yang-Mills theory: An overview of a program 
    Milsted, Ashley; Osborne, Tobias J. (College Park, MD : American Physical Society, 2018)
    We present an overview of a program to understand the low-energy physics of quantum Yang-Mills theory from a quantum-information perspective. Our setting is that of the Hamiltonian formulation of pure Yang-Mills theory in ...
  • Quantum Zeno-based detection and state engineering of ultracold polar molecules 
    Jamadagni, Amit; Ospelkaus, Silke; Santos, Luis; Weimer, Hendrik (College Park, MD : APS, 2021)
    We present and analyze a toolbox for the controlled manipulation of ultracold polar molecules, consisting of detection of molecules, atom-molecule entanglement, and engineering of dissipative dynamics. Our setup is based ...
  • Quantum-Classical Hybrid Systems and their Quasifree Transformations 
    Dammeier, Lars; Werner, Reinhard F. (Wien : Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften, 2023)
    We study continuous variable systems, in which quantum and classical degrees of freedom are combined and treated on the same footing. Thus all systems, including the inputs or outputs to a channel, may be quantum-classical ...
  • Quantum-Classical hybrid systems and their quasifree transformations 
    Dammeier, Lars (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2024)
    The focus of this work is the description of a framework for quantum-classical hybrid systems. The main emphasis lies on continuous variable systems described by canonical commutation relations and, more precisely, the ...
  • Quantum-Enhanced Advanced LIGO Detectors in the Era of Gravitational-Wave Astronomy 
    Tse, M.; Yu, H.; Kijbunchoo, N.; Fernandez-Galiana, A.; Dupej, P.; Barsotti, L.; Blair, C.D.; Brown, D.D.; Dwyer, S.E.; Effler, A.; et al.; Bode, N.; Booker, P.; Liu, J.; Meylahn, F.; Willke, B. (College Park, MD : American Physical Society, 2019)
    The Laser Interferometer Gravitational Wave Observatory (LIGO) has been directly detecting gravitational waves from compact binary mergers since 2015. We report on the first use of squeezed vacuum states in the direct ...
  • Quantum-Fluctuation-driven crossover from a dilute bose-einstein condensate to a macrodroplet in a dipolar quantum fluid 
    Chomaz, L.; Baier, S.; Petter, D.; Mark, M.J.; Wächtler, F.; Santos, Luis; Ferlaino, F. (College Park, MD : American Physical Society, 2016)
    In a joint experimental, theoretical effort, we report on the formation of a macrodroplet state in an ultracold bosonic gas of erbium atoms with strong dipolar interactions. By precise tuning of the s-wave scattering length ...
  • Quantum-optical control techniques for atomic motional states 
    Schmidt, Sönke (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2012)
    [no abstract]
  • Quantumness of states : from positive P-representations to entanglement tests 
    Korbicz, Jarosław (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2006)
    [no abstract]
  • The quarter median 
    Baringhaus, Ludwig; Grübel, Rudolf (Berlin ; Heidelberg : Springer, 2022)
    We introduce and discuss a multivariate version of the classical median that is based on an equipartition property with respect to quarter spaces. These arise as pairwise intersections of the half-spaces associated with ...
  • A quasi-monolithic phase-field description for mixed-mode fracture using predictor–corrector mesh adaptivity 
    Fan, Meng; Jin, Yan; Wick, Thomas (London : Springer, 2022)
    In this work, we develop a mixed-mode phase-field fracture model employing a parallel-adaptive quasi-monolithic framework. In nature, failure of rocks and rock-like materials is usually accompanied by the propagation of ...
  • Das quasistationäre Stefan-Problem mit variablen Relaxationskoeffizienten 
    Lukarevski, Martin (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2012)
    [no abstract]
  • Eine Quelle Bose-Einstein-kondensierter Ensembles auf Basis eines mesokopischen Atomchips 
    Jöllenbeck, Stefan (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2012)
    [no abstract]
  • Eine Quelle quantenentarteter Gase für die Atominterferometrie 
    Zaiser, Maic (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2010)
    [no abstract]

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