Voltage fluctuations on a superconductor grain attached to a quantum wire

Details Voltage fluctuations on a superconductor grain attached to a quantum wire Voltage fluctuations on a superconductor grain attached to a quantum wire

1998-10-22

arxiv.org/abs/cond-mat/9810303v3

Physics

Condensed Matter

Superconductivity

5 pages, 3 figures. Figures added

Scientific paper

10.1006/spmi.1999.0736

When a finite superconductor is in contact with a 1D normal conductor, superconducting phase fluctuations lead to power-law response of the normal subsystem. As a result, the charge fluctuations on the superconductor at zero temperature have logarithmic correlator and a 1/\omega power spectrum (1/f-noise). At higher temperatures 1/\omega is pushed to the high frequency region, and 1/\omega^2 behavior prevails.

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