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18 April 2024

» arxiv » 0911.0911

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Aharonov-Bohm conductance through a single-channel quantum ring: Persistent-current blockade and zero-mode dephasing
A. P. Dmitriev ; I. V. Gornyi ; V. Yu. Kachorovskii ; D. G. Polyakov ;
Date:	4 Nov 2009
Abstract:	We study the effect of electron-electron interaction on transport through a tunnel-coupled single-channel ring within the Luttinger liquid model. We find that the conductance as a function of magnetic flux shows a series of interaction-induced resonances that survive thermal averaging. The distance between the resonances is given by the interaction strength $alpha$. We show that main mechanism of dephasing in the almost closed ring is due to circular-current fluctuations. The dephasing rate is proportional to the tunneling rate and temperature and, remarkably, does not depend on $alpha$.
Source:	arXiv, 0911.0911
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