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Title: On the nonequilibrium statistical operator and classical thermofield dynamics
Authors: Silva, Lourival M. da
Santana, Ademir Eugênio
Vianna, José David Mangueira
Assunto:: Operador estatístico de não equilíbrio
Elementos de simetria
Issue Date: Dec-1997
Citation: SILVA, Lourival M. da; SANTANA, Ademir Eugênio; VIANNA, José David Mangueira. On the nonequilibrium statistical operator and classical thermofield dynamics. Brazilian Journal of Physics, São Paulo, v. 27, n. 4, dez. 1997. p. 619-631. Disponível em: <>. Acesso em: 26 out. 2010. doi: 10.1590/S0103-97331997000400025.
Abstract: A nonequilibrium statistical operator (NSO) is built for classical sistems using a eld theory in classical phase space, which is but a classical version of the thermo eld dynamics formalism. The approach developed here starts with a second-quantized version of this phase-space eld theory. Then elements of symmetry are analysed and invariants of the theory are introduced. The local conservation laws are derived and used to make explicit NSO. Such a method is applied to derive the Fokker-Planck-Kramers equation.
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