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Interference of directed paths in disordered systems

Abstract:

We consider sums over directed paths, interfering due to quenched random elements controlling either the phase or the sign of each term. The former enter the determination of electronic transport in the localized regime, and the latter that of correlations in the high-temperature phase of the Ising spin-glass. Numerical computations in two dimensions indicate anomalous fluctuations dominated by untypical paths, with scaling behavior similar to that of random but positive impurities. This is argued to follow from a bound state, due to a subtle attraction between pairs, in replica space. © 1989 The American Physical Society.

Año de publicación:

1989

Keywords:

    Fuente:

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    Tipo de documento:

    Article

    Estado:

    Acceso restringido

    Áreas de conocimiento:

      Áreas temáticas:

      • Ciencias de la computación

      Contribuidores:

      Ernesto Medina DaggerErnesto Medina Dagger
      Kardar M.Kardar M.
      Shapir Y.Shapir Y.
      Wang X.Wang X.