Quantum M-component spin glass with physically acceptable entropy

We analyze the quantum version of an M-component spin-glass model that, in the limit M→∞, exhibits a positive entropy with the correct properties in the limit T→0. We generalize the model in the presence of a transverse field Γ by using a fermionic representation for the spin operators. We present results for the phase diagram Tc vs Γ, entropy and order parameters.

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Year of publication:	2008
Authors:	Santos, Eduardo M.M. ; Theumann, Alba
Published in:	Physica A: Statistical Mechanics and its Applications. - Elsevier, ISSN 0378-4371. - Vol. 387.2008, 12, p. 2661-2667
Publisher:	Elsevier
Subject:	Quantum spin glass \| Fermionic representation \| Replica symmetry breaking

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Type of publication:	Article
Source:	RePEc - Research Papers in Economics

Persistent link: https://www.econbiz.de/10011057923