Abstract
The Hierarchical Model is a one dimensional ferromagnetic spin model with long range forces . Using the invariance of this model under a suitable renormalization group , we analyse the temperature behavior of the system . In particular , we prove the existence of a non-trivial fixed point and compute its critical indices using a local linearization of the renormalization transformation around the fixed point . Some global results ( cross-over ) are also described , and they provide a description of the phases near the critical point . This talk summarizes some of the results of joint work with J-P.Eckmann [C.E.].
Work supported by the University of Geneva. 2
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References
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Collet, P. (1979). Renormalization group approach to the hierarchical model. In: Albeverio, S., et al. Feynman Path Integrals. Lecture Notes in Physics, vol 106. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-09532-2_71
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DOI: https://doi.org/10.1007/3-540-09532-2_71
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