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Statistical Properties of The First Excited State of an Interacting Many Particle Disordered System

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arxiv cond-mat/0304245 v2 pith:DQ5PUWBB submitted 2003-04-10 cond-mat.dis-nn cond-mat.mes-hall

Statistical Properties of The First Excited State of an Interacting Many Particle Disordered System

classification cond-mat.dis-nn cond-mat.mes-hall
keywords firstinteractingspacecalculatedcharacterizeconductorcrossesdiffusive
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The distribution $P_1$ of the first many-body excitation energy of a weakly and moderately interacting electron gas in a finite conductor (in the diffusive regime) is calculated. As the interaction is increased, $P_1$ crosses over from Wigner-Dyson to Poisson. We characterize this transition through the inverse participation ratio in Hilbert space, and examine its manifestation in a projected 2-dimensional space.

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