Many-Body Coherence in Quantum Transport

• URL: http://arxiv.org/abs/2304.11151v6
• Date: Thu, 31 Aug 2023 16:55:07 GMT
• Title: Many-Body Coherence in Quantum Transport
• Authors: Ching-Chi Hang, Liang-Yan Hsu
• Abstract summary: We show that many-body coherence can eliminate the well-known Coulomb staircase and cause strong negative differential resistance. This development opens up a new direction for exploring quantum electronic devices based on many-body coherence.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• 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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