Remarks on the Nyquist and Callen-Welton Theorems
arXiv:cond-mat/0606161 · doi:10.1016/j.physa.2006.07.018
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.
14 pages, 0 figures, sumitted in Physica A