Dynamics of Nondegenerate Three-Level Laser with a Closed Cavity Containing N-Three-Level Atoms and Coupled to Two-Mode Vacuum Reservoir

Abstract

In this research we have studied the squeezing, entanglement and statistical prop erties of the cavity light beams produced by a nondegenerate three-level laser with a closed cavity and coupled to a two-mode vacuum reservoir via a single-port mir ror. We have carried out our analysis by putting the noise operators associated with the vacuum reservoir in normal order. Applying the solutions of the equations of evolution for the expectation values of the atomic operators, the interaction Hamil tonian and the quantum Langavin equations for the cavity mode operators, we have calculated the mean and variance of the photon number as well as the quadrature squeezing, photon and atom entanglement of the cavity light. We have found that the mean photon number and its fluctuation, quadrature squeezing, and photon entanglement within the laser cavity are enhanced by increasing the stimulated emission decay constant. In addition, proper choice of the amplitude of the driv ing coherent light increases these non-classical features. The mean photon number and its fluctuation also become more intense for large frequency interval. Moreover, the squeezing and entanglement of the two-mode light are directly related and their maximum strength is found to be 43%.