Two-spin dynamic autocorrelations and energy diffusion in the Heisenberg paramagnet

We establish the kinetic equation for the two-spin time-dependent correlation function in the Weiss limit. Considering this equation in the limit of small wavenumbers, we obtain an explicit expression for the energy diffusion coefficient. We also discuss some difficulties connected with overcounting problems of the Weiss approximation.

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Year of publication:	1977
Authors:	De Leener, M. ; Résibois, P.
Published in:	Physica A: Statistical Mechanics and its Applications. - Elsevier, ISSN 0378-4371. - Vol. 87.1977, 1, p. 63-93
Publisher:	Elsevier

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Type of publication:	Article
Source:	RePEc - Research Papers in Economics

Persistent link: https://www.econbiz.de/10010584893