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Proceedings Paper

Open Quantum Systems And The Two-Level Atom Interacting With A Single Mode Of The Electromagnetic Field
Author(s): A. Sandulescu; E Stefnescu
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Paper 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.

Paper Details

Date Published: 18 May 1989
PDF: 6 pages
Proc. SPIE 1033, Trends in Quantum Electronics, (18 May 1989); doi: 10.1117/12.950609
Show Author Affiliations
A. Sandulescu, Central Institute of Physics (Romania)
E Stefnescu, R&D Center for Electronic Components (Romania)

Published in SPIE Proceedings Vol. 1033:
Trends in Quantum Electronics
Ioan Ursu, Editor(s)

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