Equilibrium dynamics of a paramagnetic cluster
- 1 February 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 51 (6) , 3974-3977
- https://doi.org/10.1103/physrevb.51.3974
Abstract
The transverse autocorrelation function at an arbitrary temperature is calculated rigorously for a system with an arbitrary number of quantum spins, each of which is coupled to all the other spins with equal exchange. It is shown that the cluster approximation, formed by a model for a real magnet, explains short- and intermediate-time (up to the time to reach the spin-diffusion regime) experimental measurements in the paramagnetic phase.Keywords
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