Full counting statistics of generic spin entangler with quantum dot-ferromagnet detectors

Ognjen Malkoc, Christian Bergenfeldt, Peter Samuelsson

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Sammanfattning

Entanglement between spatially separated electrons in nanoscale transport is a fundamental property, yet to be demonstrated experimentally. Here we propose and analyse theoretically the transport statistics of a generic spin entangler coupled to a hybrid quantum dot-ferromagnet detector system. We show that the full distribution of charges arriving at the ferromagnetic terminals provides complete information on the spin state of the particles emitted by the entangler. This provides means for spin entanglement detection via electrical current correlations, with optimal measurement strategies depending on the a priori knowledge of ferromagnet polarization and spin-flip rates in the detector dots. The scheme is exemplified by applying it to Andreev and triple dot entanglers. Copyright (C) EPLA, 2014
Originalspråkengelska
Artikelnummer47013
TidskriftEurophysics Letters
Volym105
Utgåva4
DOI
StatusPublished - 2014

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