Entanglement Analysis of the Light Generated by Non-Degenarate three-Level Atom Interacting With Coherent Light and Coupled to two-Mode Squeezed Vacuum Reservoir
No Thumbnail Available
Date
2020-09-09
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa University
Abstract
We study the statistical, the squeezing and entanglement properties of the light produced
by coherently driven non-degenerate three-level atom in a cavity coupled to a two-mode
vacuum reservoir. With the use of the master equation and large time approximation, we
obtain the equations of evolution for the expectation values of cavity mode and atomic
operators. We have calculated the mean and variance of the photon number, photon
number correlation, and quadrature squeezing using the steady state solutions of the
equations of evolution. It is found that the cavity mean photon number is the sum of the
mean of the photon emitted by the atom and the mean of the squeezed vacuum reservoir
photons. Moreover, the mean photon number for the two modes are equal. In addition,
we noticed that the two-mode cavity light is in a squeezed state and the squeezing occurs
in the minus quadrature, with a maximum squeezing of 93.75% for
= 0.5, r = 1.75, and
c = 0. Furthermore, the entanglement of the cavity radiation is studied using different
criteria. The Duan et al. criteria, Hillery-Zubairy criteria, and logarithmic negativity
criteria demonstrate that the two-mode cavity photons are entangled. The brightness of
the cavity lights are affected by the rate of stimulated photon emission, the amplitude
of coherent light and the parameter of the two-mode squeezed vacuum reservoir. Both the
squeezing and entanglement increase with the amplitude of coherent light and the squeeze
parameter.
Description
Keywords
Entanglement, Analysis of the Light, Generated, Non-Degenarate, Atom Interacting, Coherent Light, Squeezed, Vacuum Reservoir