A. Liebman et Gj. Milburn, EFFECTS OF DAMPING ON THE QUANTUM LIMITS TO OPTICAL-PHASE SHIFTS IN KERR NONLINEAR MEDIA, Physical review. A, 47(5), 1993, pp. 4528-4531
It was recently shown [Phys. Rev. A 45, 1919 (1992)] that the phase sh
ift induced by a control beam on a signal in cross Kerr modulation is
limited by the quantum nature of the control. We show that dissipation
rapidly restores the classical phase shift.