Correlation Inequalities for the Quantum XY Model
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.
| Main Authors: | , , |
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| Format: | Online |
| Language: | English |
| Published: |
Springer US
2016
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| Online Access: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4977339/ |