Brownian motion of spins; generalized spin Langevin equation

Jayannavar, AM (1991) Brownian motion of spins; generalized spin Langevin equation. In: Zeitschrift für Physik B: Condensed Matter, 82 (1). pp. 153-156.

PDF Brownian_motion_of_spins.pdf - Published Version Restricted to Registered users only Download (336Kb) | Request a copy

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.

Item Type:	Journal Article
Additional Information:	Copyright of this article belongs to Springer.
Keywords:	Integral Approach;Quantum.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	16 Nov 2010 07:03
Last Modified:	16 Nov 2010 07:03
URI:	http://eprints.iisc.ernet.in/id/eprint/33694

Actions (login required)

View Item