Dt. Pope et al., Disagreement between correlations of quantum mechanics and stochastic electrodynamics in the damped parametric oscillator - art. no. 042108, PHYS REV A, 6204(4), 2000, pp. 2108
Intracavity and external third order correlations in the damped nondegenera
te parametric oscillator are calculated for quantum mechanics and stochasti
c electrodynamics (SED), a semiclassical theory. The two theories yield gre
atly different results, with the correlations of quantum mechanics being cu
bic in the system's nonlinear coupling constant and those of SED being line
ar in the same constant. In particular, differences between the two theorie
s are present in at least a mesoscopic regime. They also exist when realist
ic damping is included. Such differences illustrate distinctions between qu
antum mechanics and a hidden variable theory for continuous variables.