Abstract
A series of inequalities for partition, correlation, and Ursell functions are derived as consequences of the Lee-Yang Theorem. In particular, then-point Schwinger functions ofeven φ4 models are bounded in terms of the 2-point function as strongly as is the case for Gaussian fields; this strengthens recent results of Glimm and Jaffe and shows that renormalizability of the 2-point function by fourth degree counter-terms implies existence of a φ4 field theory with a moment generating function which is entire of exponential order at most two. It is also noted that ifany (even) truncated Schwinger function vanishes identically, the resulting field theory is a generalized free field.
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Communicated by A.S. Wightman
Supported in part by the Indiana University Foundation and by the National Science Foundation under Grant NSF-GP-24003.
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Newman, C.M. Inequalities for Ising models and field theories which obey the Lee-Yang Theorem. Commun.Math. Phys. 41, 1–9 (1975). https://doi.org/10.1007/BF01608542
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DOI: https://doi.org/10.1007/BF01608542