Auflistung nach Schlagwort "Quantum entanglement"

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  • Arbitrary Phase Access for Stable Fiber Interferometers 
    Roztocki, Piotr; MacLellan, Benjamin; Islam, Mehedi; Reimer, Christian; Fischer, Bennet; Sciara, Stefania; Helsten, Robin; Jestin, Yoann; Cino, Alfonso; Chu, Sai T.; Little, Brent; Moss, David J.; Kues, Michael; Morandotti, Roberto (Weinheim : Wiley VCH, 2021)
    Well-controlled yet practical systems that give access to interference effects are critical for established and new functionalities in ultrafast signal processing, quantum photonics, optical coherence characterization, ...
  • Broadband detection of 18 teeth in an 11-dB squeezing comb 
    Wilken, Dennis; Junker, Jonas; Heurs, Michèle (College Park, Md. [u.a.] : American Physical Society, 2024)
    Squeezed vacuum is a versatile resource of bipartite entanglement for quantum metrology and information. Optical parametric oscillators generate these states in a frequency comb structure. We show the simultaneous detection ...
  • Entanglement and extreme spin squeezing of unpolarized states 
    Vitagliano, Giuseppe; Apellaniz, Iagoba; Kleinmann, M.; Lücke, Bernd; Klempt, Carsten; Toth, Geza (Bristol : Institute of Physics Publishing, 2017)
    We present criteria to detect the depth of entanglement in macroscopic ensembles of spin-j particles using the variance and second moments of the collective spin components. The class of states detected goes beyond traditional ...
  • Entanglement Swapping with Semiconductor-Generated Photons Violates Bell’s Inequality 
    Zopf, Michael; Keil, Robert; Chen, Yan; Yang, Jingzhong; Chen, Disheng; Ding, Fei; Schmidt, Oliver G. (College Park, MA : American Physical Society, 2019)
    Transferring entangled states between photon pairs is essential in quantum communication. Semiconductor quantum dots are the leading candidate for generating polarization-entangled photons deterministically. Here we show ...
  • High efficiency grating couplers for strain tunable GaAs quantum dot based entangled photon sources 
    Schmidt, Constantin; Ma, Chenxi; Benthin, Frederik; Yang, Jingzhong; Rugeramigabo, Eddy P.; Zopf, Michael; Ding, Fei (New York, NY : American Inst. of Physics, 2024)
    The on-chip integration of single photon and entangled photon emitters such as epitaxially grown semiconductor quantum dots into photonic frameworks is a rapidly evolving research field. GaAs quantum dots offer high purity ...
  • Jones index, secret sharing and total quantum dimension 
    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 ...
  • 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, ...
  • Simulating open quantum systems: From many-body interactions to stabilizer pumping 
    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 ...
  • Single photon emission from ODT passivated near-surface GaAs quantum dots 
    Cao, Xin; Yang, Jingzhong; Li, Pengji; Zhang, Yiteng; Rugeramigabo, Eddy P.; Brechtken, Benedikt; Haug, Rolf J.; Zopf, Michael; Ding, Fei (Melville, NY : American Inst. of Physics, 2021)
    Epitaxially grown semiconductor quantum dots are promising candidates for pure single photon and polarization-entangled photon pair emission. Excellent optical properties can typically be ensured only if these so-called ...
  • Smallest state spaces for which bipartite entangled quantum states are separable 
    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 ...
  • Unraveling Two-Photon Entanglement via the Squeezing Spectrum of Light Traveling through Nanofiber-Coupled Atoms 
    Hinney, Jakob; Prasad, Adarsh S.; Mahmoodian, Sahand; Hammerer, Klemens; Rauschenbeutel, Arno; Schneeweiss, Philipp; Volz, Jürgen; Schemmer, Max (College Park, Md. : APS, 2021)
    We observe that a weak guided light field transmitted through an ensemble of atoms coupled to an optical nanofiber exhibits quadrature squeezing. From the measured squeezing spectrum we gain direct access to the phase and ...