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arXiv · 1011.5571

Current noise and Coulomb effects in superconducting contacts

A. V. Galaktionov·A. D. Zaikin
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Abstract

We derive an effective action for contacts between superconducting terminals with arbitrary transmission distribution of conducting channels. In the case of normal-superconducting (NS) contacts we evaluate interaction correction to Andreev conductance and demonstrate a close relation between Coulomb effects and shot noise in these systems. In the case of superconducting (SS) contacts we derive the electron-electron interaction correction to the Josephson current. At $T=0$ both corrections are found to vanish for fully transparent NS and SS contacts indicating the absence of Coulomb effects in this limit.

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A. V. Galaktionov, A. D. Zaikin. 2010-11-25. Current noise and Coulomb effects in superconducting contacts. https://doi.org/10.1088/1742-6596%2F248%2F1%2F012029

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