Experimental Violation of Two-Party Leggett-Garg Inequalities with Semi-weak Measurements

Details Experimental Violation of Two-Party Leggett-Garg Inequalities with Semi-weak Measurements Experimental Violation of Two-Party Leggett-Garg Inequalities with Semi-weak Measurements

2011-01-25

arxiv.org/abs/1101.4917v1

Phys.Rev.Lett.106:040402,2011

Physics

Quantum Physics

4 pages, 6 figures

Scientific paper

10.1103/PhysRevLett.106.040402

We generalize the derivation of Leggett-Garg inequalities to systematically treat a larger class of experimental situations by allowing multi-particle correlations, invasive detection, and ambiguous detector results. Furthermore, we show how many such inequalities may be tested simultaneously with a single setup. As a proof of principle, we violate several such two-particle inequalities with data obtained from a polarization-entangled biphoton state and a semi-weak polarization measurement based on Fresnel reflection. We also point out a non- trivial connection between specific two-party Leggett-Garg inequality violations and convex sums of strange weak values.

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