TY - JOUR
T1 - Experimental violation of two-party Leggett-Garg inequalities with semiweak measurements
AU - Dressel, J.
AU - Broadbent, C. J.
AU - Howell, J. C.
AU - Jordan, A. N.
PY - 2011/1/24
Y1 - 2011/1/24
N2 - We generalize the derivation of Leggett-Garg inequalities to systematically treat a larger class of experimental situations by allowing multiparticle 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 semiweak polarization measurement based on Fresnel reflection. We also point out a nontrivial connection between specific two-party Leggett-Garg inequality violations and convex sums of strange weak values.
AB - We generalize the derivation of Leggett-Garg inequalities to systematically treat a larger class of experimental situations by allowing multiparticle 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 semiweak polarization measurement based on Fresnel reflection. We also point out a nontrivial connection between specific two-party Leggett-Garg inequality violations and convex sums of strange weak values.
UR - http://www.scopus.com/inward/record.url?scp=79251524599&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.106.040402
DO - 10.1103/PhysRevLett.106.040402
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AN - SCOPUS:79251524599
SN - 0031-9007
VL - 106
JO - Physical Review Letters
JF - Physical Review Letters
IS - 4
M1 - 040402
ER -