Localization in non-Hermitian quantum mechanics and flux-line pinning in superconductors

Details Localization in non-Hermitian quantum mechanics and flux-line pinning in superconductors Localization in non-Hermitian quantum mechanics and flux-line pinning in superconductors

1998-01-27

arxiv.org/abs/cond-mat/9801283v1

Physica A 254 (1998) 317-331.

Physics

Condensed Matter

Statistical Mechanics

An invited talk at StatPhys-Taipei1997 (August 1997, Taiwan). To be published in Physica A: Statistical and Mathematical Physi

Scientific paper

A recent development in studies of random non-Hermitian quantum systems is reviewed. Delocalization was found to occur under a sufficiently large constant imaginary vector potential even in one and two dimensions. The phenomenon has a physical realization as flux-line depinning in type-II superconductors. Relations between the delocalization transition and the complex energy spectrum of the non-Hermitian systems are described. Analytical and numerical results obtained for a non-Hermitian Anderson model are shown.

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