Auflistung nach Titel

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  • Quantum interference in an electron-hole graphene ring system 
    Smirnov, D.; Schmidt, H.; Haug, Rolf J. (College Park, MD : American Institute of Physics, 2013)
    Quantum interference is observed in a graphene ring system via the Aharonov Bohm effect. As graphene is a gapless semiconductor, this geometry allows to study the unique situation of quantum interference between electrons ...
  • Quantum key security : theory and analysis of experimental realisations 
    Duhme, Jörg (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2015)
    [no abstract]
  • Quantum limit of different laser power stabilization schemes involving optical resonators 
    Kwee, P.; Willke, Benno; Danzmann, Karsten (Bristol : IOP Publishing Ltd., 2010)
    Three different laser power stabilization schemes are compared: a traditional power stabilization, a traditional one with subsequent optical resonator, and a power stabilization with the novel optical ac coupling technique. ...
  • Quantum logic inspired techniques for spacetime-symmetry tests with (anti-)protons 
    Cornejo, Juan M.; Lehnert, Ralf; Niemann, Malte; Mielke, Johannes; Meiners, Teresa; Bautista-Salvador, Amado; Schulte, Marius; Nitzschke, Diana; Borchert, Matthias J.; Hammerer, Klemens; Ulmer, Stefan; Ospelkaus, Christian ([London] : IOP, 2021)
    Cosmological observations as well as theoretical approaches to physics beyond the standard model provide strong motivations for experimental tests of fundamental symmetries, such as CPT invariance. In this context, the ...
  • Quantum logic spectroscopy of atomic and molecular ions 
    Wan, Yong (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2014)
    [no abstract]
  • Quantum magnetism without lattices in strongly interacting one-dimensional spinor gases 
    Deuretzbacher, Frank; Becker, D.; Bjerlin, J.; Reimann, S.M.; Santos, Luis (College Park, MD : American Physical Society, 2014)
    We show that strongly interacting multicomponent gases in one dimension realize an effective spin chain, offering an alternative simple scenario for the study of one-dimensional (1D) quantum magnetism in cold gases in the ...
  • Quantum many-body dynamics of driven-dissipative Rydberg polariton systems 
    Pistorius, Tim (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2021)
    We present the successful solution of the notoriously hard but experimentally highly relevant many-body problem of driven-dissipative Rydberg polaritons in an optical lattice. From the continuous model, we derive a dispersion ...
  • Quantum memories for fundamental science in space 
    Mol, Jan-Michael; Esguerra, Luisa; Meister, Matthias; Bruschi, David Edward; Schell, Andreas Wolfgang; Wolters, Janik; Wörner, Lisa (Philadelphia, PA : IOP Publishing, 2023)
    Investigating and verifying the connections between the foundations of quantum mechanics and general relativity will require extremely sensitive quantum experiments. To provide ultimate insight into this fascinating area ...
  • Quantum metrology for gravitational wave astronomy 
    Schnabel, Roman; Mavalvala, Nergis; McClelland, David E.; Lam, Ping K. (London : Nature Publishing Group, 2010)
    Einstein's general theory of relativity predicts that accelerating mass distributions produce gravitational radiation, analogous to electromagnetic radiation from accelerating charges. These gravitational waves (GWs) have ...
  • Quantum metrology using tailored non-classical states 
    Junker, Jonas (Hannover : Institutionelles Repositorium der Leibniz Unversität Hannover, 2023)
    Squeezed states of light play a significant role in various technologies ranging from high-precision metrology such as gravitational wave detection to quantum information.These quantum states are prepared to carry particular ...
  • Quantum metrology with Einstein-Podolsky-Rosen entangled atoms 
    Kruse, Ilka (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2015)
    [no abstract]
  • Quantum metrology with squeezed and entangled light for the detection of gravitational waves 
    Steinlechner, Sebastian (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2013)
    [no abstract]
  • Quantum nanofriction in trapped ion chains with a topological defect 
    Timm, L.; Rüffert, L.A.; Weimer, H.; Santos, L.; Mehlstäubler, T.E. (College Park, MD : APS, 2021)
    Trapped ion systems constitute a well controllable scenario for the study and emulation of nanofriction, and in particular of Frenkel-Kontorova-like models. This is in particular the case when a topological defect is created ...
  • Quantum neural networks 
    Beer, Kerstin (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2022)
    Quantum computing is one of the most exciting research areas of the last decades. At the same time, methods of machine learning have started to dominate science, industry and our everyday life. In this thesis we combine ...
  • Quantum noise cancellation in asymmetric speed metres with balanced homodyne readout 
    Zhang, T.; Knyazev, E.; Steinlechner, S.; Khalili, F.Y.; Barr, B. W.; Bell, A. S.; Dupej, P.; Briggs, J.; Graf, C.; Callaghan, J.; Hennig, J. S.; Houston, E. A.; Huttner, S. H.; Leavey, S.S.; Pascucci, D.; Sorazu, B.; Spencer, A.; Wright, J.; Strain, K.A.; Hild, S.; Danilishin, S.L. (Bristol : IOP Publishing Ltd., 2018)
    The Sagnac speed metre topology has been identified as a promising technique to reduce quantum back-action in gravitational-wave interferometers. However, imbalance of the main beamsplitter has been shown to increase the ...
  • Quantum noise limits to simultaneous quadrature amplitude and phase stabilization of solid-state lasers 
    Huntington, E.H.; Harb, C.C.; Heurs, Michèle; Ralph, T.C. (College Park, MD : American Physical Society, 2007)
    A quantum mechanical model is formulated to describe the coupling between pump intensity noise and laser frequency noise in a solid-state laser. The model allows us to investigate the limiting effects of closed-loop ...
  • Quantum Otto heat engine based on a multiferroic chain working substance 
    Azimi, M.; Chotorlishvili, L.; Mishra, S.K.; Vekua, Teimuraz; Huebner, W.; Berakdar, J. (Bristol : IOP Publishing Ltd., 2014-06-12)
    We study a quantum Otto engine operating on the basis of a helical spin-1/2 multiferroic chain with strongly coupled magnetic and ferroelectric order parameters. The presence of a finite spin chirality in the working ...
  • Quantum phases of a chain of strongly interacting anyons 
    Finch, Peter E.; Frahm, Holger; Lewerenz, Marius; Milsted, Ashley; Osborne, Tobias J. (College Park (Maryland) : American Physical Society, 2014)
    Quantum gates for the manipulation of topological qubits rely on interactions between non-Abelian anyonic quasiparticles. We study the collective behavior of systems of anyons arising from such interactions. In particular, ...
  • Quantum Physics at School—What do Teachers need? Results of a Delphi Study 
    Weber, Kim-Alessandro; Friege, Gunnar; Scholz, Rüdiger (Berlin [u.a.] : Springer, 2020)
    Quantum physics is considered to be equally important and challenging for teaching physics at school. This paper aims to provide an empirical basis for the construction of guidelines for a teacher training course on quantum ...
  • Quantum sensing of oscillating electric fields with trapped ions 
    Wolf, Fabian; Schmidt, Piet O. ([London] : Elsevier Ltd., 2021)
    Quantum noise is a fundamental limitation for quantum sensors and results in the so-called shot-noise limit. Nowadays, several systems such as optical clocks or gravitational wave detectors approach measurement sensitivities ...