Correlation inequalities for the quantum XY model

Costanza Benassi, Benjamin T Lees, Daniel Ueltschi

Research output: Contribution to journalArticle (Academic Journal)peer-review

4 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)1157--1166
Number of pages9
JournalJournal of Statistical Physics
Publication statusPublished - 2016


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