Generation of Quantum Features of Light Via Non-degenerate Three-Level Atom Coupled to two-mode vacuum reservoir

Abstract

In this thesis, we have studied the squeezing, entanglement and statistical properties of the cavity light beams produced by a coherently driven nondegenerate three-level laser with an open 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 vac uum reservoir in normal order. Applying the solutions of the equations of evolution for the expectation values of the atomic operators and the quantum Langevin equations for the cavity mode operators, we have calculated the mean and variance of the photon number as well as the quadrature squeezing of the cavity light. We have found that a large part of the mean and the variance of the photon number are confined in a relatively small frequency interval. The analysis showed that the intracav ity quadrature squeezing is enhanced due to the absence of spontaneous emission. It is revealed that the squeezing and entanglement in the two-mode light are directly re lated. Moreover, We have observed that the degree of cavity-atomic state entanglement is greater than the photon entanglement of light.