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Remarks on the Nyquist and Callen-Welton Theorems

S. A. Trigger, G. J. F. van Heijst, A. A. Rukhadze, P. P. J. M. Schram

cond-mat.stat-mecharXiv:cond-mat/0606161

Abstract

The connection of the Callen-Welton and Nyquist fluctuation-dissipation relations is considered for plasma-like classical and quantum systems. The conditions for appearance of the dissipative parameters in the equilibrium current-current correlation function are investigated. The paper presents the arguments for the restrictions of the Nyquist theorem and against violation of the Callen-Welton theorem in the quantum case.

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