Elementary Charge Transfer Processes in a Superconductor-Ferromagnet Entangler

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 conductances and polarizations. Finally, we investigate how currents, noise and cross correlations are affected by transport of entangled electrons.

5 pages. Rewritten manuscript with 2 new figures. Title changed from v1

References in corpus (2)

• Current-current correlations in hybrid superconducting and normal metal multiterminal structures
• Full Counting Statistics with Spin-sensitive Detectors reveals Spin-singlets

Cited by in corpus (4)

• Spin-induced charge correlations in transport through interacting quantum dots with ferromagnetic leads
• Full counting statistics of crossed Andreev reflection
• Self-consistent microscopic calculations for non-local transport through nanoscale superconductors
• Maximal positive cross shot noise from Andreev reflection