Auflistung nach Schlagwort "states"

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  • Bosonization and entanglement spectrum for one-dimensional polar bosons on disordered lattices 
    Deng, Xiaolong; Citro, Roberta; Orignac, Edmond; Minguzzi, Anna; Santos, Luis (Bristol : IOP Publishing Ltd., 2013-04-26)
    Ultra cold polar bosons in a disordered lattice potential, described by the extended Bose-Hubbard model, display a rich phase diagram. In the case of uniform random disorder one finds two insulating quantum phases-the ...
  • Experimental measurement-device-independent verification of quantum steering 
    Kocsis, Sacha; Hall, Michael J. W.; Bennet, Adam J.; Saunders, Dylan J.; Pryde, Geoff J. (London : Nature Publishing Group, 2015)
    Bell non-locality between distant quantum systems-that is, joint correlations which violate a Bell inequality-can be verified without trusting the measurement devices used, nor those performing the measurements. This leads ...
  • Experimental simulation and limitations of quantum walks with trapped ions 
    Matjeschk, R.; Schneider, C; Enderlein, M.; Huber, T.; Schmitz, H.; Glueckert, J.; Schaetz, T. (Bristol : IOP Publishing Ltd., 2012)
    We examine the prospects of discrete quantum walks (QWs) with trapped ions. In particular, we analyze in detail the limitations of the protocol of Travaglione and Milburn (2002 Phys. Rev. A 65 032310) that has been implemented ...
  • Gaussian entanglement for quantum key distribution from a single-mode squeezing source 
    Eberle, Tobias; Haendchen, Vitus; Duhme, Jörg; Franz, Torsten; Furrer, Fabian; Schnabel, Roman; Werner, Reinhard F. (Bristol : IOP Publishing Ltd., 2013-05-30)
    We report the suitability of an Einstein-Podolsky-Rosen entanglement source for Gaussian continuous-variable quantum key distribution at 1550 nm. Our source is based on a single continuous-wave squeezed vacuum mode combined ...
  • Interferometric sensitivity and entanglement by scanning through quantum phase transitions in spinor Bose-Einstein condensates 
    Feldmann, P.; Gessner, M.; Gabbrielli, M.; Klempt, Carsten; Santos, Luis; Pezze, L.; Smerzi, A. (College Park : American Physical Society, 2018)
    Recent experiments demonstrated the generation of entanglement by quasiadiabatically driving through quantum phase transitions of a ferromagnetic spin-1 Bose-Einstein condensate in the presence of a tunable quadratic Zeeman ...
  • A novel, robust quantum detection scheme 
    Hemmerling, Boerge; Gebert, Florian; Wan, Yong; Schmidt, Piet O. (Bristol : IOP Publishing Ltd., 2012)
    Protocols used in quantum information and precision spectroscopy rely on efficient internal quantum state discrimination. With a single ion in a linear Paul trap, we implement a novel detection method which utilizes ...
  • Number-phase uncertainty relations and bipartite entanglement detection in spin ensembles 
    Vitagliano, Giuseppe; Fadel, Matteo; Apellaniz, Iagoba; Kleinmann, Matthias; Lücke, Bernd; Klempt, Carsten; Tóth, Géza (Wien : Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften, 2023)
    We present a method to detect bipartite entanglement based on number-phase-like uncertainty relations in split spin ensembles. First, we derive an uncertainty relation that plays the role of a number-phase uncertainty for ...
  • Phase magnification by two-axis countertwisting for detection-noise robust interferometry 
    Anders, Fabian; Pezze, Luca; Smerzi, Augusto; Klempt, Carsten (College Park : American Physical Society, 2018)
    Entanglement-enhanced atom interferometry has the potential of surpassing the standard quantum limit and eventually reaching the ultimate Heisenberg bound. The experimental progress is, however, hindered by various technical ...
  • Preparation of Ultracold Atom Clouds at the Shot Noise Level 
    Gajdacz, M.; Hilliard, A.J.; Kristensen, M.A.; Pedersen, P.L.; Klempt, Carsten; Arlt, Jan J.; Sherson, J.F. (College Park : American Physical Society, 2016)
    We prepare number stabilized ultracold atom clouds through the real-time analysis of nondestructive images and the application of feedback. In our experiments, the atom number N similar to 10(6) is determined by high ...
  • Real-space observation of surface structuring induced by ultra-fast-laser illumination far below the melting threshold 
    Zaum, C.; Osterloh, N.; Darkins, R.; Duffy, D.M.; Morgenstern, K. ([London] : Macmillan Publishers Limited, part of Springer Nature, 2021)
    Intense short laser pulses are an intriguing tool for tailoring surface properties via ultra-fast melting of the surface layer of an irradiated target. Despite extensive studies on the interaction of femto-second laser ...
  • Resonant five-body recombination in an ultracold gas of bosonic atoms 
    Zenesini, Alessandro; Huang, Bo; Berninger, Martin; Besler, Stefan; Naegerl, Hanns-Christoph; Ferlaino, Francesca; Grimm, Rudolf; Greene, Chris H.; Stecher, Javier von (Bristol : IOP Publishing Ltd., 2013-04-22)
    We combine theory and experiment to investigate five-body recombination in an ultracold gas of atomic cesium at negative scattering length. A refined theoretical model, in combination with extensive laboratory tunability ...