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arXiv · 2304.11151

Many-Body Coherence in Quantum Transport

Ching-Chi Hang·Liang-Yan Hsu
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Abstract

In this study, we propose the concept of harnessing quantum coherence to control electron transport in a many-body system. Combining an open quantum system technique based on Hubbard operators, we show that many-body coherence can eliminate the well-known Coulomb staircase and cause strong negative differential resistance. To explore the mechanism, we analytically derive the current-coherence relationship in the zero electron-phonon coupling limit. Furthermore, by incorporating a gate field, we demonstrate the possibility of constructing a coherence-controlled transistor. This development opens up a new direction for exploring quantum electronic devices based on many-body coherence.

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Ching-Chi Hang, Liang-Yan Hsu. 2023-04-21. Many-Body Coherence in Quantum Transport. https://doi.org/10.1103/physrevb.108.125422

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