Parity Fluctuations Between Coulomb Blockaded Superconducting Islands

Details Parity Fluctuations Between Coulomb Blockaded Superconducting Islands Parity Fluctuations Between Coulomb Blockaded Superconducting Islands

1995-05-08

arxiv.org/abs/cond-mat/9505030v1

Physics

Condensed Matter

4 pages, self-unpacking uuencoded gz-compressed postscript file with 3 figures included; also available at http://www.lassp.

Scientific paper

10.1103/PhysRevLett.75.1154

We find that if two superconducting islands of different number parity are linked by a tunnel junction the unpaired electron in the odd island has a tendency to tunnel into the even island. This process leads to fluctuations in time of the number parity of each island, giving rise to a random telegraph noise spectrum with a characteristic frequency that has an unusual temperature dependence. This new phenomenon should be observable in a Cooper-pair pump and similar single-electron tunneling devices.

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