Realistic operation of an entangler : a density matrix approach
Mesoscale and Nanoscale Physics
2007-05-23 v1
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.
Cite
@article{arxiv.cond-mat/0405581,
title = {Realistic operation of an entangler : a density matrix approach},
author = {Olivier Sauret and Denis Feinberg and Thierry Martin},
journal= {arXiv preprint arXiv:cond-mat/0405581},
year = {2007}
}
Comments
4 pages, 4 figures. To appear in the proceedings of the XXXIXth Rencontres de Moriond (La Thuile, 2004) "Quantum information and decoherence in nanosystems"