单量子点的异常热扩散、绝对负迁移率和反向热输运。

IF 2.4 3区物理与天体物理 Q1 Mathematics

Physical review. E Pub Date : 2025-04-01 DOI:10.1103/PhysRevE.111.044112

Yanchao Zhang, Xiaolong Lü

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引用次数: 0

摘要

在温度梯度和偏置电压的影响下，研究了嵌入在两个能级之间的单能级量子点系统的稳态输运特性。在定制的参数范围内，系统可以分别表现出反常热扩散、绝对负迁移率和反向热输运三种违反直觉的输运现象。这些违反直觉的现象并不违反热力学第二定律。此外，绝对负迁移率和反向热输运可以通过可逆能级来识别。这些异常输运不同于热电输运，为更全面地理解量子系统的输运特性提供了不同的视角。

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

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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来源期刊

Physical review. E 物理-物理：流体与等离子体

CiteScore

4.60

自引率

16.70%

发文量

审稿时长

3.3 months

期刊介绍： Physical Review E (PRE), broad and interdisciplinary in scope, focuses on collective phenomena of many-body systems, with statistical physics and nonlinear dynamics as the central themes of the journal. Physical Review E publishes recent developments in biological and soft matter physics including granular materials, colloids, complex fluids, liquid crystals, and polymers. The journal covers fluid dynamics and plasma physics and includes sections on computational and interdisciplinary physics, for example, complex networks.