Abstract
We study the equilibrium phase diagram of a generalized ABC model on an interval of the one-dimensional lattice: each site i=1,…,N is occupied by a particle of type α=A,B,C, with the average density of each particle species N α /N=r α fixed. These particles interact via a mean field nonreflection-symmetric pair interaction. The interaction need not be invariant under cyclic permutation of the particle species as in the standard ABC model studied earlier. We prove in some cases and conjecture in others that the scaled infinite system N→∞, i/N→x∈[0,1] has a unique density profile ρ α (x) except for some special values of the r α for which the system undergoes a second order phase transition from a uniform to a nonuniform periodic profile at a critical temperature \(T_{c}=3\sqrt{r_{A} r_{B} r_{C}}/2\pi\).
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Dedicated to Cyril Domb, from whom we have learned so much.
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Barton, J., Lebowitz, J.L. & Speer, E.R. Phase Diagram of a Generalized ABC Model on the Interval. J Stat Phys 145, 763–784 (2011). https://doi.org/10.1007/s10955-011-0279-7
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DOI: https://doi.org/10.1007/s10955-011-0279-7