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Q: Fachverband Quantenoptik und Photonik
Q 24: Quantum Effects: Entanglement and Decoherence III
Q 24.2: Talk
Tuesday, March 24, 2015, 14:45–15:00, B/gHS
Nonlocal photon correlations and violation of Bell inequalities for spatially separated classical light fields — •Daniel Bhatti1, Raimund Schneider1, Thomas Mehringer1,2, Steffen Oppel1, and Joachim von Zanthier1,2 — 1Institut für Optik, Information und Photonik, Universität Erlangen-Nürnberg, 91058 Erlangen, Germany — 2Erlangen Graduate School in Advanced Optical Technologies (SAOT), Universität Erlangen-Nürnberg, 91052 Erlangen, Germany
Recently it was proposed that a violation of Bell's inequalities may not only be used to quantify correlations between quantum systems but also between coupled degrees of freedom of classical systems [1-3]. Such strong correlations among coupled degrees of freedom of classical systems, called classical entanglement, have been recently used to describe the coherence properties of classical light beams, either for discrete or continuous variables [1,3]. Here we demonstrate that Bell's inequalities can be equally violated with spatially separated particles produced by classical systems, i.e., photons emitted by classical light sources recorded in spatially separated modes. We thus show that non local multiparticle entanglement is not restricted to the quantum world but may be observed also with classical systems.
[1] B. N. Simon et al., Phys. Rev. Lett 104, 023901 (2010).
[2] K. H. Kagalwala, G. Di Giuseppe, A. F. Abouraddy, B. E. Saleh, Nat. Photonics 7, 72 (2013).
[3] P. Chowdhury, A. S. Majumdar, G. S. Agarwal, Phys. Rev. A 88, 013830 (2013).