Role of quantum entanglement due to a magnetic impurity on current magnification effect in mesoscopic open rings
arXiv:cond-mat/0011402 · doi:10.1142/S0217984901001471
Abstract
We study the current magnification effect in presence of exchange scattering of electron from a magnetic impurity placed in one arm of an open mesoscopic ring. The exchange interaction causes entanglement of electron spin and impurity spin. Earlier studies have shown that such an entanglement causes reduction or loss of interference in the Aharonov-Bohm oscillations leading to decoherence. We find however, that this entanglement, in contradiction to the naive expectation of a reduction of current magnification, leads to enhancement as well as suppression of the effect. We also observe additional novel features like new resonances and current reversals.
5 pages RevTex, 5 figures included
Cited by in corpus (6)
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- Effect of quantum entanglement on Aharonov-Bohm oscillations, spin-polarized transport and current magnification effect