- 00-462 Aldo Procacci, Benedetto Scoppola
- On decay of correlations for unbounded spin systems
with arbitrary boundary conditions.
(67K, plain tex)
Nov 21, 00
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Abstract. We propose a method based on cluster expansion to study
the truncated correlations of unbounded spin systems uniformly
in the boundary condition and in a possible external field.
By this method we study the spin-spin truncated correlations of
various systems, including the case of infinite
range simply integrable interactions,
and we show how suitable boundary conditions and/or external fields
may improve the decay of the correlations.
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