A Generalized Fluctuation-Dissipation Theorem for Nonlinear Response Functions

Details A Generalized Fluctuation-Dissipation Theorem for Nonlinear Response Functions A Generalized Fluctuation-Dissipation Theorem for Nonlinear Response Functions

1998-09-02

arxiv.org/abs/hep-th/9809016v1

Phys.Rev.D66:025008,2002

Physics

High Energy Physics

High Energy Physics - Theory

34 pages, Revtex

Scientific paper

10.1103/PhysRevD.66.025008

A nonlinear generalization of the Fluctuation-Dissipation Theorem (FDT) for the n-point Green functions and the amputated 1PI vertex functions at finite temperature is derived in the framework of the Closed Time Path formalism. We verify that this generalized FDT coincides with known results for n=2 and 3. New explicit relations among the 4-point nonlinear response and correlation (fluctuation) functions are presented.

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