Current noise and Coulomb effects in superconducting contacts

Details Current noise and Coulomb effects in superconducting contacts Current noise and Coulomb effects in superconducting contacts

2010-11-25

arxiv.org/abs/1011.5571v1

J. Phys.: Conf. Ser. 248, 012029 (2010)

Physics

Condensed Matter

Superconductivity

8 pages, 1 figure

Scientific paper

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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