Elementary charge transfer processes in a superconductor-ferromagnet entangler

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Published 15 January 2008 Europhysics Letters Association
, , Citation J. P. Morten et al 2008 EPL 81 40002 DOI 10.1209/0295-5075/81/40002

0295-5075/81/4/40002

Abstract

We study the production of spatially separated entangled electrons in ferromagnetic leads from Cooper pairs in a superconducting lead. We give a complete description of the elementary charge transfer processes, i) transfer of Cooper pairs out of the superconductor by Andreev reflection and ii) distribution of the entangled quasiparticles among the ferromagnetic leads, in terms of their statistics. The probabilities that entangled electrons flow into spatially separated leads are completely determined by experimentally measurable tunnel conductances and polarizations. Finally, we investigate how currents, noise and cross-correlations are affected by transport of entangled electrons.

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10.1209/0295-5075/81/40002