Lack of self-averaging in spin glasses
- 20 February 1984
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 17 (5) , L149-L154
- https://doi.org/10.1088/0022-3719/17/5/005
Abstract
The authors show that there are significant sample variations for the probability distribution of the overlap between phases in the Sherrington-Kirkpatrick spin glass model even in the thermodynamic limit. However experimentally observable quantities, such as the magnetisation, energy and Edwards-Anderson (finite time) order parameter take the same value in all samples. The fluctuation-dissipation theorem holds when a sample average is performed but not for each sample separately.Keywords
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