Driven systems and the Lax formula

Document Type

Article

Publication Date

5-25-2000

Abstract

One of the most widely used tools in quantum optics, the Lax formula for two-time correlations, is studied. The formula is then applied to two driven quantum systems: the oscillator and the two-level atom. Through a comparison with exact results for the oscillator, it is shown explicitly that the Lax formula is a weak coupling approximation that does not include quantum corrections on the Onsager regression hypothesis of classical statistical physics. For the two-level atom, the calculation of the well known Burshtein-Mollow spectrum of resonance fluorescence is extended to the case of non-zero temperature.

Publication Source (Journal or Book title)

Optics Communications

First Page

451

Last Page

461

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