Abstract
A class of low temperature lattice classical spin models with a symmetry groupO(N) is considered, including the classical Heisenberg model. In this paper a renormalization group approach in a small field approximation is formulated and studied, with a goal to prove the so-called “spin wave picture” displaying massless behavior of the models.
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Communicated by D. Brydges
The work has been partially supported by the NSF Grant DMS-9102639
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Balaban, T. A low temperature expansion for classicalN-vector models. I. A renormalization group flow. Commun.Math. Phys. 167, 103–154 (1995). https://doi.org/10.1007/BF02099355
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DOI: https://doi.org/10.1007/BF02099355