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Derivation of the fluctuation-dissipation theorem from unitarity. (English) Zbl 1332.81161

Summary: Using the closed time path formalism in thermal field theory, we give a derivation of the fluctuation-dissipation (FD) theorem which is based on the unitarity of the \(S\)-matrix.

MSC:

81T28 Thermal quantum field theory
81U20 \(S\)-matrix theory, etc. in quantum theory

References:

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