Residual Coulomb interaction fluctuations in chaotic systems: the boundary, random plane waves, and semiclassical theory

Details Residual Coulomb interaction fluctuations in chaotic systems: the boundary, random plane waves, and semiclassical theory Residual Coulomb interaction fluctuations in chaotic systems: the boundary, random plane waves, and semiclassical theory

2007-12-03

arxiv.org/abs/0712.0225v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevLett.100.164101

New fluctuation properties arise in problems where both spatial integration and energy summation are necessary ingredients. The quintessential example is given by the short-range approximation to the first order ground state contribution of the residual Coulomb interaction. The dominant features come from the region near the boundary where there is an interplay between Friedel oscillations and fluctuations in the eigenstates. Quite naturally, the fluctuation scale is significantly enhanced for Neumann boundary conditions as compared to Dirichlet. Elements missing from random plane wave modeling of chaotic eigenstates lead surprisingly to significant errors, which can be corrected within a purely semiclassical approach.

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