Two-spin entanglement induced by electron scattering in nanostructures

Details Two-spin entanglement induced by electron scattering in nanostructures Two-spin entanglement induced by electron scattering in nanostructures

2006-07-24

arxiv.org/abs/cond-mat/0607603v2

Phys. Rev. B 74, 153308 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.74.153308

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.

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