Two-spin entanglement induced by electron scattering in nanostructures
Mesoscale and Nanoscale Physics
2007-05-23 v2 Quantum Physics
Abstract
We present a model where two magnetic impurities in a discrete tight-binding ring become entangled because of scattering processes associated to the injection of a conduction electron. We introduce a weak coupling approximation that allows us to solve the problem in a analytical way and compare the theory with the exact numerical results. We obtain the generation of entanglement both in a deterministic way and in a probabilistic one. The first case is intrinsically related to the structure of the two-impurity reduced density matrix, while the second one occurs when a projection on the electron state is performed.
Cite
@article{arxiv.cond-mat/0607603,
title = {Two-spin entanglement induced by electron scattering in nanostructures},
author = {Gian Luca Giorgi and Ferdinando de Pasquale},
journal= {arXiv preprint arXiv:cond-mat/0607603},
year = {2007}
}