Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
977188 | Physica A: Statistical Mechanics and its Applications | 2009 | 8 Pages |
Abstract
In this paper, we derive the time-dependent solution of the effective master equation for the reduced density matrix operator of a two-level atom driven by a coherent laser field and damped by a finite-bandwidth squeezed vacuum. The master equation has the standard form known from the broadband squeezing approaches but with new effective squeezing parameters NË and MË and new rate coefficients. There are also new terms, proportional to β, which are essentially narrow-bandwidth modifications determined by the parameters γn, δn and the shifts δN and δM. These parameters become zero when the squeezing bandwidth tends to infinity. The effects of the detuning parameter Î of the driving laser field frequency ÏL from the atomic resonance ÏA and the squeezing parameters NË and MË on the atomic inversion, the von Neumann entropy and the resonance fluorescence spectrum are discussed.
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Physical Sciences and Engineering
Mathematics
Mathematical Physics
Authors
A.-S.F. Obada, S. Abdel-Khalek, M.M.A. Ahmed, D.A.M. Abo-Kahla,