Thermofield Dynamics of Time-Dependent Boson and Fermion Systems

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dc.creatorKim, Sang Pyo
dc.creatorKhanna, F. C.
dc.date2003-08-09
dc.date.accessioned2026-07-07T06:07:35Z
dc.date.available2026-07-07T06:07:35Z
dc.descriptionWe formulate the thermofield dynamics for time-dependent systems by combining the Liouville-von Neumann equation, its invariant operators, and the basic notions of thermofield dynamics. The new formulation is applied to time-dependent bosons and fermions by using the time-dependent annihilation and creation operators that satisfy the Liouville-von Neumann equation. It is shown that the thermal state is the time- and temperature-dependent vacuum state and a general formula is derived to calculate the thermal expectation value of operators.
dc.descriptionRevTex4 11 pages, no figure
dc.identifierhttps://arxiv.org/abs/quant-ph/0308053
dc.identifierhttp://arxiv.org/abs/quant-ph/0308053
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/91340
dc.subjectQuantum Physics
dc.titleThermofield Dynamics of Time-Dependent Boson and Fermion Systems
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