Testing quantum nonlocality by generalized quasiprobability functions

Details Testing quantum nonlocality by generalized quasiprobability functions Testing quantum nonlocality by generalized quasiprobability functions

2009-08-04

arxiv.org/abs/0908.0541v1

Phys. Rev. A 80, 022104 (2009)

Physics

Quantum Physics

6 pages, 3 figures

Scientific paper

10.1103/PhysRevA.80.022104

We derive a Bell inequality based on a generalized quasiprobability function which is parameterized by one non-positive real value. Two types of known Bell inequalities formulated in terms of the Wigner and Q functions are included as limiting cases. We investigate violations of our Bell inequalities for single photon entangled states and two-mode squeezed vacuum states when varying the detector efficiency. We show that the Bell inequality for the Q function allows the lowest detection efficiency for violations of local realism.

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