Correlation inequalities for the quantum XY model
Mathematical Physics
2016-08-12 v3 math.MP
Abstract
We show the positivity or negativity of truncated correlation functions in the quantum XY model with spin 1/2 (at any temperature) and spin 1 (in the ground state). These Griffiths-Ginibre inequalities of the second kind generalise an earlier result of Gallavotti.
Keywords
Cite
@article{arxiv.1510.03215,
title = {Correlation inequalities for the quantum XY model},
author = {Costanza Benassi and Benjamin Lees and Daniel Ueltschi},
journal= {arXiv preprint arXiv:1510.03215},
year = {2016}
}
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9 pages