Giant Violations of Classical Inequalities through Conditional Homodyne Detection of the Quadrature Amplitudes of Light
H. J. Carmichael, H. M. Castro-Beltrán, G. T. Foster, Luis A. Orozco · Physical Review Letters · 2000
Conditional homodyne detection is proposed as an extension of the intensity correlation technique introduced by Hanbury-Brown and Twiss [Nature (London) 177, 27 (1956)]. It detects giant quadrature amplitude fluctuations for weakly squeezed light, violating a classical bound by orders of magnitude. Fluctuations of both quadrature amplitudes are anomalously large. The squeezed quadrature also exhibits an anomalous phase.