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A proposal to test Bell’s inequalities with mesoscopic non-local states in cavity QED

  • P. Milman
  • A. Auffeves
  • F. Yamaguchi
  • M. Brune
  • J. M. RaimondEmail author
  • S. Haroche
Entanglement and Non-Locality

Abstract.

We propose a cavity quantum electrodynamics (CQED) experiment to test the violation of a Bell-type inequality using non-local mesoscopic states (NLMS). These states involve coherent field superpositions stored in two spatially-separated high-Q cavities. The inequality is expressed in terms of the measured Wigner function of the entangled two-field-mode system at four points in phase space, as proposed in [Banaszek and Wódkiewicz, Phys. Rev. Lett. 82, 2009 (1999)]. We examine the production of these entangled NLMS and the measurement of their Wigner function. The experiment involves circular Rydberg atoms and superconducting millimeter-wave cavities. We present a detailed numerical study of the optimal inequality violation and of the effect of decoherence. We discuss the range of experimental parameters making it possible to observe a locality violation and show that they correspond to realistic, albeit demanding, conditions.

Keywords

Phase Space Experimental Parameter Quantum Computing Wigner Function Quantum Electrodynamic 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2004

Authors and Affiliations

  • P. Milman
    • 1
  • A. Auffeves
    • 1
  • F. Yamaguchi
    • 2
  • M. Brune
    • 1
  • J. M. Raimond
    • 1
    Email author
  • S. Haroche
    • 1
    • 3
  1. 1.Laboratoire Kastler BrosselParis Cedex 05France
  2. 2.Edward L. Ginzton Laboratory, Stanford UniversityStanfordUSA
  3. 3.Collège de France, 11 place Marcelin-BerthelotParisFrance

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