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2001 Strict Inequality for Phase Transition between Ferromagnetic and Frustrated Systems
Emilio De Santis
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Electron. J. Probab. 6: 1-27 (2001). DOI: 10.1214/EJP.v6-79


We consider deterministic and disordered frustrated systems in which we can show some strict inequalities with respect to related ferromagnetic systems. A case particularly interesting is the Edwards-Anderson spin-glass model in which it is possible to determine a region of uniqueness of the Gibbs measure, which is strictly larger than the region of uniqueness for the related ferromagnetic system. We analyze also deterministic systems with $|J_b| \in [J_A, J_B]$ where $0 \lt J_A \leq J_B \lt \infty$, for which we prove strict inequality for the critical points of the related FK model. The results are obtained for the Ising models but some extensions to Potts models are possible.


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Emilio De Santis. "Strict Inequality for Phase Transition between Ferromagnetic and Frustrated Systems." Electron. J. Probab. 6 1 - 27, 2001.


Accepted: 7 February 2001; Published: 2001
First available in Project Euclid: 19 April 2016

zbMATH: 1050.82020
MathSciNet: MR1825713
Digital Object Identifier: 10.1214/EJP.v6-79

Primary: 82B26
Secondary: 82B31 , 82B43 , 82B44 , 82C20

Keywords: Disordered systems , Ising model , phase transition , stochastic order

Vol.6 • 2001
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