Dynamics Of Coherently Driven Degenerate Three-level Atom In Open Cavity

In this thesis, we study the quantum properties of the light generated by a coherentlyrndriven degenerate three-level atom in an open cavity coupled to a vacuum reservoir. Thernthree-level atom available in the cavity is driven by coherent light from the bottom tornthe top level. We perform our analysis by putting the noise operators associated withrnthe vacuum reservoir in normal order. Employing the master equation and the quantumrnLangevin equation we obtain the di erential equations of the atomic and cavity-modernoperators. Using the steady-state solutions of the resulting equations, we determined thernphoton statistics, quadrature squeezing and the local mean photon number. It is observedrnthat the mean photon number is greater when rn = 0 than when rn = 0:1. We nd, likernthe mean photon number, the variance of the photon number to be greater for rn = 0rnthan for rn = 0:1. Moreover, we have also established that the maximum quadraturernsqueezing of the light generated by the atom, to be 43.42 % for rn = 0 and 42.22 % forrnrn = 0:1 below the coherent-state level. Thus in the absence of spontaneous emission thernmean, the variance and the quadrature squeezing of the cavity light is greater than in thernpresence of spontaneous emission. Finally, we have found that a large part of the totalrnmean photon number is con ned in a relatively small frequency interval

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