Abstract
A simple derivation is given of the fluctuation-dissipation theorem or generalized Nyquist formula. The proof is based on a solution of the Langevin equation for a thermodynamic variable according to Ornstein's method; in this way the correlation function and the spectrum are obtained directly in the desired form.
- Received 29 July 1957
DOI:https://doi.org/10.1103/PhysRev.109.1021
©1958 American Physical Society
