Phys. Rev. Lett. 91, 267003 (2003) [4 pages]Dynamical Coulomb Blockade and Spin-Entangled ElectronsReceived 17 July 2003; published 30 December 2003 We consider the creation of mobile and nonlocal spin-entangled electrons from tunneling of a BCS-superconductor (SC) to two normal leads of finite resistivity. The resulting dynamical Coulomb blockade effect, which we describe phenomenologically in terms of an electromagnetic environment, is shown to be enhanced for tunneling of two electrons from a Cooper pair into the same lead compared to the desired pair-split process where each electron enters a different lead. Conversely, this latter process is suppressed by a finite separation between the tunneling points on the SC. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.267003
DOI:
10.1103/PhysRevLett.91.267003
PACS:
74.45.+c, 03.65.Ud, 73.23.Hk, 74.50.+r
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