Jayannavar, AM (1991) Brownian motion of spins; generalized spin Langevin equation. In: Zeitschrift für Physik B: Condensed Matter, 82 (1). pp. 153-156.
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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.
|Item Type:||Journal Article|
|Additional Information:||Copyright of this article belongs to Springer.|
|Department/Centre:||Division of Physical & Mathematical Sciences > Physics|
|Date Deposited:||16 Nov 2010 07:03|
|Last Modified:||16 Nov 2010 07:03|
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