Quantum noise. XIII. Six-classical-variable description of quantum laser fluctuations

Melvin Lax*, Horace Yuen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


An exact c-number generalized Fokker-Planck equation is derived for six noncommuting variables: the field variables, atomic populations, and atomic polarization of a laser model treated extensively by Lax. Langevin procedures yield the correct Fokker-Planck terms. Adiabatic eliminations are performed on the classical Markoff process given by the Fokker-Planck equation to compare with previous results. It is found that higher-order diffusion coefficients influence the second-order ones slightly during adiabatic elimination.

Original languageEnglish (US)
Pages (from-to)362-371
Number of pages10
JournalPhysical Review
Issue number2
StatePublished - 1968

ASJC Scopus subject areas

  • General Physics and Astronomy


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