Abstract
We consider a two-dimensional Ising ferromagnet with (+) boundary conditions and negative external field, where a Markovian time evolution is assumed.
We construct, suitably restricting the allowed configurations att=0, a non equilibrium state with positive magnetization such that:
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1)
only one phase is present,
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2)
the relaxation time for unit volume is finite and can be made very large.
These results are obtained following a general method for describing metastable states proposed by Lebowitz and Penrose and exploiting the analysis of the Ising-spin-configurations in terms of contours given by Minlos and Sinai.
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Communicated by J. L. Lebowitz
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Capocaccia, D., Cassandro, M. & Olivieri, E. A study of metastability in the Ising model. Commun.Math. Phys. 39, 185–205 (1974). https://doi.org/10.1007/BF01614240
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DOI: https://doi.org/10.1007/BF01614240