Browsing by Subject "Quantum optics"

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  • Zopf, Michael; Macha, Tobias; Keil, Robert; Urunuela, Eduardo; Chen, Yan; Alt, Wolfgang; Ratschbacher, Lothar; Ding, Fei; Meschede, Dieter; Schmidt, Oliver G. (College Park : American Physical Society, 2018)
    We employ active feedback to stabilize the frequency of single photons emitted by two separate quantum dots to an atomic standard. The transmission of a rubidium-based Faraday filter serves as the error signal for frequency ...
  • Arndt, Markus; Bassi, Angelo; Giulini, Domenico; Heidmann, Antoine; Raimond, Jean-Michel (Amsterdam : Elsevier BV, 2011)
    We discuss recent studies on the foundations of quantum physics with photonic, atomic, molecular and micromechanical systems as well as theoretical treatments of the interface between quantum physics and classical observations. ...
  • Bény, Cédric (Bristol : Institute of Physics Publishing, 2017)
    A spin system on a lattice can usually be modeled at large scales by an effective quantum field theory. A key mathematical result relating the two descriptions is the quantum central limit theorem, which shows that certain ...
  • Fiedler, Leander; Naaijkens, Pieter; Osborne, Tobias J. (Bristol : Institute of Physics Publishing, 2017)
    We study the total quantum dimension in the thermodynamic limit of topologically ordered systems. In particular, using the anyons (or superselection sectors) of such models, we define a secret sharing scheme, storing ...
  • Bozhevolnyi, Sergey I.; Evlyukhin, Andrey B.; Pors, Anders; Nielsen, Michael G.; Willatzen, Morten; Albrektsen, Ole (Bristol : IOP Publishing Ltd., 2011)
    We demonstrate that optical transparency can be realized with plasmonic metamaterials using unit cells consisting of detuned electrical dipoles (DED), thereby mimicking the dressed-state picture of the electromagnetically ...
  • Schulte, M.; Lörch, N.; Leroux, I.D.; Schmidt, Piet O.; Hammerer, K. (College Park, MD : American Physical Society, 2016)
    Optical clocks based on ensembles of trapped ions promise record frequency accuracy with good short-term stability. Most suitable ion species lack closed transitions, so the clock signal must be read out indirectly by ...
  • Müller, M.; Hammerer, Klemens; Zhou, Y.L.; Roos, C.F.; Zoller, P. (Bristol : IOP Publishing Ltd., 2011)
    In a recent experiment, Barreiro et al (2011 Nature 470 486) demonstrated the fundamental building blocks of an open-system quantum simulator with trapped ions. Using up to five ions, dynamics were realized by sequences ...
  • Anwar, H.; Jevtic, S.; Rudolph, O.; Virmani, S. (Bristol : Institute of Physics Publishing, 2015)
    According to usual definitions, entangled states cannot be given a separable decomposition in terms of products of local density operators. If we relax the requirement that the local operators be positive, then an entangled ...
  • Del Campo, A.; Retzker, A.; Plenio, Martin B. (Bristol : IOP Publishing Ltd., 2011)
    The Kibble-Zurek mechanism is applied to the spontaneous formation of vortices in a harmonically trapped thermal gas following a temperature quench through the critical value for Bose-Einstein condensation. Whereas in the ...
  • 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, ...
  • Hinderthür, H.; Pautz, A.; Rieger, V.; Ruschewitz, F.; Peng, J.L.; Sengstock, K.; Ertmer, Wolfgang (American Physical Society, 1997)
    We present an atom interferometer based on the interference of three partial matter waves in three different internal and external states. Coherent laser excitation acts as a beamsplitter to create a superposition state ...