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Realistic operation of an entangler : a density matrix approach

Olivier Sauret·Denis Feinberg·Thierry Martin
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Abstract

The detailed operation of an electron spin entangler is studied, using density matrix equations. The device is made of a superconductor, two quantum dots and two normal leads. The treatment takes into account coherent tunneling in a non-perturbative way, and analyzes the various parasitic effects, in addition to the main process (crossed Andreev reflection) : those include singlet pairs passing through a single dot, or cotunneling between dots through the superconductor. The optimum operation of the device is characterized.

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Olivier Sauret, Denis Feinberg, Thierry Martin. 2004-05-25. Realistic operation of an entangler : a density matrix approach. https://arxiv.org/abs/cond-mat/0405581

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