Loophole-free Bell test with one atom and less than one photon on average

N. Sangouard, J.-D. Bancal, N. Gisin, W. Rosenfeld, P. Sekatski, M. Weber, and H. Weinfurter
Phys. Rev. A 84, 052122 – Published 28 November 2011

Abstract

We consider the entanglement between two internal states of a single atom and two photon number states describing either the vacuum or a single photon and thus containing, on average, less than one photon. We show that this intriguing entanglement can be characterized through substantial violations of a Bell inequality by performing homodyne detections on the optical mode. We present the experimental challenges that need to be overcome to pave the way toward a loophole-free Bell test.

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  • Received 3 August 2011

DOI:https://doi.org/10.1103/PhysRevA.84.052122

©2011 American Physical Society

Authors & Affiliations

N. Sangouard1, J.-D. Bancal1, N. Gisin1, W. Rosenfeld2, P. Sekatski1, M. Weber2, and H. Weinfurter2

  • 1Group of Applied Physics, University of Geneva, CH-1211 Geneva 4, Switzerland
  • 2Fakultat fur Physik, Ludwig-Maximilians-Universitat Munchen, DE-80799 Munchen, Germany

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Issue

Vol. 84, Iss. 5 — November 2011

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