On the relaxation of a two-level system driven by a strong electromagnetic field

Eitan Geva*, Ronnie Kosloff, J. L. Skinner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

122 Scopus citations

Abstract

A detailed and unified account of the theory of the generalized Bloch equations is presented. The equations apply to a two-level system weakly coupled to a heat bath and subject to a monochromatic rotating field of arbitrary intensity. The relaxation tensor obtained is explicitly field-dependent. The derivation is valid for general coupling to a quantum heat bath. The generalized Bloch equations are shown to be thermodynamically consistent, as opposed to the standard Bloch equations. Different limits of the generalized Bloch equations are examined and related to previous studies. The potential use of the generalized Bloch equations as a probe of the bath spectral density is demonstrated for the case of a two-level system embedded in a Debye solid.

Original languageEnglish
Pages (from-to)8541-8561
Number of pages21
JournalThe Journal of Chemical Physics
Volume102
Issue number21
DOIs
StatePublished - 1995

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