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Zeitschrift für Physik B Condensed Matter

, Volume 82, Issue 1, pp 153–156 | Cite as

Brownian motion of spins; generalized spin Langevin equation

  • A. M. Jayannavar
Article

Abstract

We derive the Langevin equations for a spin interacting with a heat bath, starting from a fully dynamical treatment. The obtained equations are non-Markovian with multiplicative fluctuations and concommitant dissipative terms obeying the fluctuation-dissipation theorem. In the Markovian limit our equations reduce to the phenomenological equations proposed by Kubo and Hashitsume. The perturbative treatment on our equations lead to Landau-Lifshitz equations and to other known results in the literature.

Keywords

Spectroscopy Neural Network State Physics Complex System Brownian Motion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • A. M. Jayannavar
    • 1
  1. 1.International Centre for Theoretical PhysicsTriesteItaly

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