Testing quantum nonlocality by generalized quasiprobability functions

Journal article

We derive a Bell inequality based on a generalized quasiprobability function, which is parametrized by one nonpositive real value. Two types of known Bell inequalities formulated in terms of the Wigner and the 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. © 2009 The American Physical Society.

Authors: Lee, S; Jeong, H; Jaksch, D

• Journal: Physical Review A - Atomic, Molecular, and Optical Physics
• Volume: 80
• Issue: 2
• Publication date: 2009-08-04
• DOI: 10.1103/PhysRevA.80.022104
• EISSN: 1094-1622
• ISSN: 1050-2947
• Language: English