Degenerate Three-level Atom Driven By Coherent Light And In A Cavity Coupled To Squeezed Vacuum Reservoir

In this thesis, we analyze the squeezing and statical properties of light produced by degeneraternthree-level atom in a cavity coupled to squeezed vacuum reservoir via a port-mirror. Thernthree-level atom available in the cavity is driven by coherent light from the bottom to the toprnlevel. Employing the master equation we obtain the differential equation of the atomic andrncavity mode operators. Applying the large time approximation to the time evolution of cavityrnmode operator and using steady-state solutions of the expectation values of cavity mode andrnatomic operators, we obtain the mean of the cavity photon number, power spectrum, quadraturernvariance and quadrature squeezing of the cavity light.We have seen that the amplitudernof the coupling coherent light, the squeezing parameter, and the stimulated emission decayrnconstant have the effect of increasing both the global and local mean photon number. Moreover,rnwe find that the quadrature squeezing of the cavity light increases with the increase ofrnthe amplitude of the driving coherent light, the rate of the stimulation decay constant, andrnsqueeze parameter. The squeeze parameter and the amplitude of the driving coherent lightrnhave the effect of enhancing the quadrature squeezing, with maximum squeezing of 58% forrnr = 0.5 and 32% for r=0.

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