Degenerate Three-Level Atom Driven by Coherent Light and in a Cavity Coupled to Squeezed Vacuum Reservoir
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Date
2022-04-18
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Addis Ababa University
Abstract
In this thesis, we analyze the squeezing and statical properties of light produced by degenerate
three-level atom in a cavity coupled to squeezed vacuum reservoir via a port-mirror. The
three-level atom available in the cavity is driven by coherent light from the bottom to the top
level. Employing the master equation we obtain the differential equation of the atomic and
cavity mode operators. Applying the large time approximation to the time evolution of cavity
mode operator and using steady-state solutions of the expectation values of cavity mode and
atomic operators, we obtain the mean of the cavity photon number, power spectrum, quadrature
variance and quadrature squeezing of the cavity light.We have seen that the amplitude
of the coupling coherent light, the squeezing parameter, and the stimulated emission decay
constant have the effect of increasing both the global and local mean photon number. Moreover,
we find that the quadrature squeezing of the cavity light increases with the increase of
the amplitude of the driving coherent light, the rate of the stimulation decay constant, and
squeeze parameter. The squeeze parameter and the amplitude of the driving coherent light
have the effect of enhancing the quadrature squeezing, with maximum squeezing of 58% for
r = 0.5 and 32% for r=0.
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Keywords
Degenerate, Three-Level Atom Driven, Coherent Light, Cavity Coupled, Squeezed Vacuum Reservoir