Towards a dephasing diode: asymmetric and geometric dephasing
Mesoscale and Nanoscale Physics
2008-03-31 v2 Disordered Systems and Neural Networks
Quantum Physics
Abstract
We study the effect of a noisy environment on spin and charge transport in ballistic quantum wires with spin-orbit coupling (Rashba coupling). We find that the wire then acts as a ``dephasing diode'', inducing very different dephasing of the spins of right and left movers. We also show how Berry phase (geometric phase) in a curved wire can induce such asymmetric dephasing, in addition to purely geometric dephasing. We propose ways to measure these effects through spin detectors, spin-echo techniques, and Aharanov-Bohm interferometry.
Cite
@article{arxiv.0709.1381,
title = {Towards a dephasing diode: asymmetric and geometric dephasing},
author = {Robert S. Whitney and Alexander Shnirman and Yuval Gefen},
journal= {arXiv preprint arXiv:0709.1381},
year = {2008}
}
Comments
4 pages (2 fig) v2: extensive improvements to "readability" & references added