Disorder-induced enhancement of the persistent current for strongly interacting electrons in one-dimensional rings
Elise Gambetti-Césare, Dietmar Weinmann, Rodolfo A. Jalabert, Philipp Brune
Abstract
We show that disorder increases the persistent current of a half-filled one-dimensional Hubbard-Anderson ring at strong interaction. This unexpected effect results from a perturbative expansion starting from the strongly interacting Mott insulator ground state. The analytical result is confirmed and extended by numerical calculations.
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