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Coarsening dynamics in a simplified DNLS model

We investigate the coarsening evolution occurring in a simplified stochastic model of the Discrete NonLinear Schrödinger (DNLS) equation in the so-called negative-temperature region. We provide an explanation of the coarsening exponent $n=1/3$, by invoking an analogy with a suitable exclusion process. In spite of the equivalence with the exponent observed in other known universality classes, this model is certainly different, in that it refers to a dynamics with two conservation laws.

preprint2013arXivOpen access
Stefano IubiniAntonio PolitiPaolo Politi
cond-mat.stat-mech
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Open access3 authors1 topic
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Stefano IubiniAntonio PolitiPaolo Politi

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