Open Quantum Systems And The Two-Level Atom Interacting With A Single Mode Of The Electromagnetic Field

A. Sandulescu; E Stefnescu

doi:10.1117/12.950609

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18 May 1989 Open Quantum Systems And The Two-Level Atom Interacting With A Single Mode Of The Electromagnetic Field

Proceedings Volume 1033, Trends in Quantum Electronics; (1989) https://doi.org/10.1117/12.950609
Event: International Conference on Trends in Quantum Electronics, 1988, Bucharest, Romania

Abstract

In the framework of a general theory of open quantum systems, we obtain a quantum master equation for the two-level atom interacting with a single mode of the electromagnetic field. On this basis, we obtain new optical equations. In comparison with the conventional Bloch-Feynman optical equations which contain three phenomenological parameters, the new equations contain nine phenomenological parameters. New physical effects , due to the opening of the system, are predicted: 1) a resonance frequency shift, 2) an asymmetry of the spectral line, 3) a modification of the dependence of the absorbtion coefficient and of the nonlinear dephasing on the atomic detuning, and 4) an additional nonlinear dependence of the absorbtion coefficient on the electric field. For a rather small atom density when the fourth effect can be neglected,we found an analytical expression of the transmittivity characteristic of an optical bistable Fabry-Perot resonator and found a good agreement with the experiment.

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A. Sandulescu and E Stefnescu "Open Quantum Systems And The Two-Level Atom Interacting With A Single Mode Of The Electromagnetic Field", Proc. SPIE 1033, Trends in Quantum Electronics, (18 May 1989); https://doi.org/10.1117/12.950609

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