Mendoza-Arenas, Juan José and Clark, Stephen R
Giant rectification in strongly-interacting boundary-driven tilted systems.
Abstract
Correlated quantum systems feature a wide range of nontrivial effects emerging from interactions between their constituting particles. In nonequilibrium scenarios, these manifest in phenomena such as many-body insulating states and anomalous scaling laws of currents of conserved quantities, crucial for applications in quantum circuit technologies. In this work we propose a giant rectification scheme based on the asymmetric interplay between strong particle interactions and a tilted potential, each of which induces an insulating state on their own. While for reverse bias both cooperate and induce a strengthened insulator with exponentially suppressed current, for forward conduction they compete and, as a result, generate current resonances; this leads to a rectification coefficient of many orders of magnitude. We uncover the mechanism underlying these resonances as enhanced coherences between energy eigenstates occurring at avoid crossing in the system's bulk energy spectrum. Our proposal paves the way for implementing a perfect diode in currently-available quantum simulation platforms.
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