Physics – Quantum Physics
Scientific paper
2009-04-28
Physics
Quantum Physics
5 pages, no figure, revtex4
Scientific paper
By virtue of the technique of integration within an ordered product (IWOP) of
operators we present a new approach for deriving generalized thermo vacuum
state which is simpler in form that the result by using the Umezawa-Takahashi
approach, in this way the thermo field dynamics can be developed. Applications
of the new state are discussed.
Fan Hong-yi
Hu Li-Yun
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