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• W2019956276 abstract "The Wigner phase-space representation of thermal excitations used in thermo-field-dynamics (TFD) is investigated. The phase-space description is obtained by introducing a reduced density operator in which the fictitious degrees of freedom of TFD are traced over. A new closed-form expression for the Wigner function of the harmonic oscillator thermal excitation is derived, thereby showing that the thermal excitation may be described as a temperature-dependent radial spreading of the coordinates and momenta in phase space. The population distribution in these stationary excitations is determined and shown to reduce to a Boltzmann distribution for the thermal vacuum only." @default.
• W2019956276 created "2016-06-24" @default.
• W2019956276 creator A5087977959 @default.
• W2019956276 date "1990-08-01" @default.
• W2019956276 modified "2023-09-24" @default.
• W2019956276 title "Wigner phase-space representation of thermal excitations" @default.
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• W2019956276 doi "https://doi.org/10.1103/physreva.42.1863" @default.
• W2019956276 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/9904233" @default.
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