Campostrini, Massimo and Pelissetto, Andrea and Rossi, Paolo and Vicari, Ettore (1997) Critical limit and anisotropy in the two-point correlation function of three-dimensional O(N) models. EPL (Europhysics letters), 38 . p. 577. ISSN 0295-5075
Full text not available from this repository.Abstract
In three-dimensional O(N) models, we investigate the low-momentum behavior of the two-point Green's function G(x) in the critical region of the symmetric phase. We consider physical systems whose criticality is characterized by a a rotationally-invariant fixed point. In non rotationally-invariant physical systems with O(N)-invariant interactions, the vanishing of anisotropy in approaching the rotationally-invariant fixed point is described by a critical exponent rho, which is universal and is related to the leading irrelevant operator breaking rotational invariance. At N=infinity one finds rho=2. 1/N expansion and strong-coupling calculations show that, for all values of N>=0, rho~2. Non-Gaussian corrections to the universal low-momentum behavior of G(x) are evaluated, and found to be very small.
Item Type: | Article |
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Additional Information: | Imported from arXiv |
Subjects: | Area02 - Scienze fisiche > FIS/02 - Fisica teorica, modelli e metodi matematici |
Divisions: | Dipartimenti (from 2013) > DIPARTIMENTO DI FISICA |
Depositing User: | dott.ssa Sandra Faita |
Date Deposited: | 11 Feb 2014 23:48 |
Last Modified: | 11 Feb 2014 23:48 |
URI: | http://eprints.adm.unipi.it/id/eprint/1874 |
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