The effect of electron-electron interactions on the average polarizability of a mesoscopic system

Details The effect of electron-electron interactions on the average polarizability of a mesoscopic system The effect of electron-electron interactions on the average polarizability of a mesoscopic system

1996-07-23

arxiv.org/abs/cond-mat/9607159v1

Physical Review B 54, 10324 (1996)

Physics

Condensed Matter

REVTeX, 11 pages, 3 figures, accepted for publication in PRB

Scientific paper

10.1103/PhysRevB.54.10324

A comparison between an analytical calculation of the polarizability of a mesoscopic interacting system in the random phase approximation and numerical exact diagonalization results is presented. While for weak interactions the analytical calculation fits the numerical results rather well, deviations appear for stronger interactions. This is the result of the appearance of intermediate range correlations in the electron density, which suppresses the polarizability below its classical value. The relevance to quantum dot systems is discussed.

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