Interaction of radiation with matter. Relevance of the statistical nature of the radiation to the time evolution of material variables

H. P. Baltes, A. Quattropani, P. Meystre

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We present the equation of motion for the reduced density matrix describing the time evolution of coupled systems for any initial statistical state, solve it for the two-level system interacting with (i) thermal and (ii) coherent radiation, and discuss the validity of the semiclassical approximation used in i.r. spectroscopy and laser theory.

Original languageEnglish (US)
Pages (from-to)9-11
Number of pages3
JournalInfrared Physics
Issue number1-2
StatePublished - Jan 1 1976


ASJC Scopus subject areas

  • Engineering(all)

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