Quantum M-component spin glass with physically acceptable entropy

Eduardo M.M. Santos and Alba Theumann

Physica A: Statistical Mechanics and its Applications, 2008, vol. 387, issue 12, 2661-2667

Abstract: 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.

Keywords: Quantum spin glass; Fermionic representation; Replica symmetry breaking (search for similar items in EconPapers)
Date: 2008
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:387:y:2008:i:12:p:2661-2667

DOI: 10.1016/j.physa.2008.01.091

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