Enhancement of Squeezing and Entanglement of a Non-degenerate Three-Level Laser with Squeezed Vacuum Reservoir

Abstract

In this thesis we analyze a nondegenerate three-level cascade laser with cavity mode coupled to a two-mode squeezed vacuum reservoir with the aid of master equation, We obtain the stochastic differential equations associated with the normal ordering,correlations of the noise force and the solutions of the resulting differential equations.Applying the solutions of the resulting differential equations.we calculate quadrature variances, photon entanglement Photon number correlations,normalized second-order correlation functions and fluctuation of intensity difference for the cavity modes.We also determine the mean photon number sum and difference and the photon number variance sum and difference for the two mode cavity light employing the Q function.We study the squeezing properties and entanglement of the two mode cavity light.It turns out that the generated light exhibits a two-mode squeezing and entanglement when initially there are more atoms in the lower level.Moreover,a strong correlation between photon numbers along with a significant fluctuation in the intensity difference is found.