AN EXPERIMENTAL TEST OF QUANTUM NONSEPARABILITY

Any experimental test of quantum nonseparability with correlated photo ns must use some instrument (either to change the settings of the pola rizers quickly [J.S. Bell, Physics 1, 195 (1964)] or to direct the pho tons stochastically to two polarizers in different settings [A. Aspect , Phys. Rev. D 14, 1944 (1976)]) to defeat any possible ''rapport'' be tween the source of light and the polarizers; but care needs to be tak en to guard against any ''rapport'' between such an instrument and the polarizers or the source of light. An experiment with Kerr cells coul d achieve this.