Squeezing and entanglement properties of Light produced by non-Degenerate Three-Level laser with degenerate Parametric amplifier sand squeezed vacuum Reservoir

Abstract

Thesqueezingandentanglementpropertiesoflightproducedbynondegeneratethreelevellaserwhosecavitycontainstwodegenerateparametricamplifiersandcoupledtosqueezed vacuum reservoir is analyzed using c-number langevin equation . Employing the c-number Langevin equation associated with the normal ordering along the correlation properties of the noise forces.We determined the quadrature squeezing (the quadrature variances of the cavity and output modes as well as the squeezing spectrum of the output modes). Furthermore,using the criterion developed by Duan et al, the quantum entanglement of the cavity modesandoutputmodesaredetermined. Thelightproducedbythesystemunderconsideration exhibits squeezing and entanglement. It is observed that the degree of squeezing and entanglement for the system under consideration increase with the amplitude of the parametricamplifiersandwiththesqueezingparameterofthesqueezedvacuumreservoir. Moreover, the degree of squeezing of the cavity modes is found to be greater than that of output modes.