Orthogonality catastrophe in a mesoscopic conductor due to a time-dependent flux

Details Orthogonality catastrophe in a mesoscopic conductor due to a time-dependent flux Orthogonality catastrophe in a mesoscopic conductor due to a time-dependent flux

1993-12-02

arxiv.org/abs/cond-mat/9312013v1

Physics

Condensed Matter

8 pages, revtex 3.0, figures by request, M.I.T. preprint

Scientific paper

We consider quantum fluctuations of current in a metallic loop induced by varying magnetic flux. The dependence of the fluctuations on the flux change $\Phi$ contains a logarithmically divergent term periodic in $\Phi$ with the period $\Phi_0=hc/e$. The fluctuation is smallest near $\Phi=n\Phi_0$. The divergence is explained by a comparison with the orthogonality catastrophe problem. The $\Phi_0-$periodicity is related with the discreteness of "attempts" in the binomial statistics picture of charge fluctuations.

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