Reflection positivity and phase transitions in lattice spin models

Details Reflection positivity and phase transitions in lattice spin models Reflection positivity and phase transitions in lattice spin models

2006-10-11

arxiv.org/abs/math-ph/0610025v2

In: R. Kotecky (ed), Methods of Contemporary Mathematical Statistical Physics, Lecture Notes in Mathematics, vol. 1970, Spring

Physics

Mathematical Physics

expanded and corrected version (content identical to that published)

Scientific paper

10.1007/978-3-540-92796-9

Reflection positivity (RP) is a property of Gibbs measures exhibited by a class of lattice spin systems that include the Ising, Potts and Heisenberg models. The RP property is useful because of its two basic consequences: infrared bound and chessboard estimates. These are one of basic (and rather efficient) tools for proving phase transitions in many models of physical interest. The notes presented hereby summarize the lectures on reflection positivity and its consequences that the author delivered at the Prague Summer School on Mathematical Statistical Mechanics in September 2006. The text features both the classical material on the subject from the late 1970s as well as some of the more recent developments.

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