Wigner-function description of quantum-mechanical nonlocality.

摘要: Fields generated in a large number of nonlinear-optical processes (including those with losses) have Wigner distribution that is Gaussian centered around the mean value field. We show Bell inequality for an optical-correlation experiment two coupled modes nonlinear process can be expressed as relating to parameters underlying function. consider examples parametric down-conversion and two-mode squeezed laser, which used experiments demonstrate quantum nonlocality.