The fluctuation-dissipation theorem

  title={The fluctuation-dissipation theorem},
  author={R Kubo},
  journal={Reports on Progress in Physics},
  pages={255 - 284}
  • R Kubo
  • Published 1966
  • Mathematics, Physics
  • Reports on Progress in Physics
The linear response theory has given a general proof of the fluctuation-dissipation theorem which states that the linear response of a given system to an external perturbation is expressed in terms of fluctuation properties of the system in thermal equilibrium. This theorem may be represented by a stochastic equation describing the fluctuation, which is a generalization of the familiar Langevin equation in the classical theory of Brownian motion. In this generalized equation the friction force…