A condition equivalent to ferromagnetism for a generalized ising model
نویسندگان
چکیده
منابع مشابه
A Condition Equivalent to Ferromagnetism for a Generalized Ising Model
JBSTRACT In the real algebra R(G) over a certain finite group, the operator exp is defined. A condition is stated on exp J which is necessary and sufficient for J in R(G) to be nonnegative (where J is viewed as a function G + R). Physically, this amounts to a condition on the correlations of a generalized system of Ising spins which is necessary and sufficient for the ferromagnetism of the system.
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ژورنال
عنوان ژورنال: Journal of Combinatorial Theory, Series A
سال: 1972
ISSN: 0097-3165
DOI: 10.1016/0097-3165(72)90097-0