Entanglement Controlled Single-Electron Transmittivity

Details Entanglement Controlled Single-Electron Transmittivity Entanglement Controlled Single-Electron Transmittivity

2006-03-17

arxiv.org/abs/cond-mat/0603456v2

New J. Phys. 8, 214 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Published version (6 figures)

Scientific paper

10.1088/1367-2630/8/9/214

We consider a system consisting of single electrons moving along a 1D wire in the presence of two magnetic impurities. Such system shows strong analogies with a Fabry - Perot interferometer in which the impurities play the role of two mirrors with a quantum degree of freedom: the spin. We have analysed the electron transmittivity of the wire in the presence of entanglement between the impurity spins. The main result of our analysis is that, for suitable values of the electron momentum, there are two maximally entangled state of the impurity spins the first of which makes the wire transparent whatever the electron spin state while the other strongly inhibits the electron transmittivity. Such predicted striking effect is experimentally observable with present day technology.

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