Realistic operation of an entangler : a density matrix approach

Details Realistic operation of an entangler : a density matrix approach Realistic operation of an entangler : a density matrix approach

2004-05-25

arxiv.org/abs/cond-mat/0405581v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures. To appear in the proceedings of the XXXIXth Rencontres de Moriond (La Thuile, 2004) "Quantum information a

Scientific paper

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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