Year: 2002
Type: article
Abstract: A nonlinear generalization of the fluctuation-dissipation theorem (FDT) for the n-point Green functions and the amputated one particle irreducible 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.
Authors: Enke Wang, Ulrich Heinz
Institution: Central China Normal University
Language: English
Subfield: Statistical and Nonlinear Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2010001442