量子迁移及其对局部热量的影响了解密闭系统的局部热容量

IF 2.4 3区 物理与天体物理 Q1 Mathematics
Altug Sisman, Jonas Fransson
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引用次数: 0

摘要

对于封闭在恒定体积内的非相互作用粒子,在低温的热力学平衡状态下,局部能量的温度导数为负值。这种奇特的行为可能会使人误以为局部热容量为负值,从而得出不符合物理学原理的结论。然而,我们的研究表明,与温度相关的密闭粒子密度变化会诱发粒子在域内的能量选择性迁移,这里称之为温度诱导量子迁移。这种宏观量子现象会导致局部热量的重新分配,并确保局部热容量不为负值。此外,它还会引起局部加热和冷却效应以及局部热容量的大量超调。量子迁移还积累了约束能的热量部分,表现为过剩的全局热容量。对局部能量波动的分析表明,热容量与波动之间的线性关系在局部尺度上被打破。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Quantum migration and its local heat impact: Understanding local heat capacity of confined systems

Quantum migration and its local heat impact: Understanding local heat capacity of confined systems
For noninteracting particles confined in a constant volume, the temperature derivative of the local energy assumes negative values in thermodynamic equilibrium at low temperatures. This peculiar behavior may entail the misleading unphysical conclusion that the local heat capacity is negative. However, we show that temperature-dependent density variations of confined particles induce an energy selective particle transport within the domain, here called temperature-induced quantum migration. This macroscopic quantum phenomenon causes a redistribution of local heat and ensures a non-negative local heat capacity. Moreover, it induces local heating and cooling effects and a massive overshoot in local heat capacity. The quantum migration also builds up the thermal part of confinement energy, manifesting in an excess global heat capacity. Analyzing the local energy fluctuations shows that the linear relationship between heat capacity and fluctuations is broken at the local scale.
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来源期刊
Physical review. E
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
0
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.
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