Aharonov-Bohm conductance through a single-channel quantum ring: Persistent-current blockade and zero-mode dephasing

Abstract

We study the effect of electron-electron interaction on transport through a tunnel-coupled single-channel ring. We find that the conductance as a function of magnetic flux shows a series of interaction-induced resonances that survive thermal averaging. The period of the series is given by the interaction strength $\alpha$. The physics behind this behavior is the blocking of the tunneling current by the circular current. The main mechanism of dephasing is due to circular-current fluctuations. The dephasing rate is proportional to the tunneling rate and does not depend on $\alpha$.

7 pages, 1 figure, typos corrected, appendix added

References in corpus (7)

• Low-frequency noise as a source of dephasing of a qubit
• Decoherence from ensembles of two-level fluctuators
• Electron transport in disordered Luttinger liquid
• The electron lifetime in Luttinger liquids
• Recent progress in open quantum systems: Non-Gaussian noise and decoherence in fermionic systems
• Tunneling conductance of a mesoscopic ring with spin-orbit coupling and Tomonaga-Luttinger interaction
• Linear conductance of an interacting carbon nanotube ring

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