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Q: Fachverband Quantenoptik und Photonik
Q 23: Quanteninformation: Photonen II
Q 23.1: Talk
Tuesday, March 3, 2009, 14:00–14:15, VMP 6 HS-D
Violation of Bell’s inequalities by light radiated from two independent sources — •Ralph Wiegner1, Christoph Thiel1, Joachim von Zanthier1, and Girish S. Agarwal2 — 1Institut für Optik, Information und Photonik, Universität Erlangen-Nürnberg, Germany — 2Department of Physics, Oklahoma State University, Stillwater, OK, USA
We study quantum interference effects of light scattered by two uncorrelated single photon sources, e.g. two trapped ions. By looking at the far-field region of the emitters we find non-classical signatures in the second order correlation function of the emitted light. First, we obtain a two-photon signal with a visibility greater than 50% [1] and, second, we can proof that our signal violates Bell-type (CH74’) inequalities [2]. Since both emitters scatter incoherently, this violation gives rise to some stunning questions which we will adress.
[1] L. Mandel, Phys. Rev. A 28, 929 (1983).
[2] J. F. Clauser, M. A. Horne, Phys. Rev. D 10, 526 (1974).