Correlation Inequalities for the Quantum XY Model
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.
- Publication:
-
Journal of Statistical Physics
- Pub Date:
- September 2016
- DOI:
- 10.1007/s10955-016-1580-2
- arXiv:
- arXiv:1510.03215
- Bibcode:
- 2016JSP...164.1157B
- Keywords:
-
- Mathematical Physics;
- 82B10;
- 82B20;
- 82B26
- E-Print:
- 9 pages