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1. chinaXiv:201607.00065 [pdf]

Entropy-Decreasing Processes With Helium-4 Superflows

Yongle Yu
分类: 物理学 >> 凝聚态:结构、力学和热性能

We argue microscopically that helium-4 superflows carry heat unavoidably. We then show that a heterogeneous helium-4 superflow loop can be used to realize an entropy-decreasing process, thus providing an exception to the second law of thermodynamics. This exception is a quantum effect for its essential dependence on the quantum phenomenon of superfluidity.

提交时间: 2017-01-10 点击量23351下载量2645 评论 0

2. chinaXiv:201609.01070 [pdf]

The Second Law of Thermodynamics and Entropy-Decreasing Processes With Helium-4 Superflows

Yongle Yu
分类: 物理学 >> 凝聚态:电子结构、电、磁和光学性质

We review on a recently proposed quantum exception to the second law of thermodynamics. We emphase that helium-4 superflows, like any other forms of flows, shall carry entropy or heat in a thermal environment. Following that, one can use a heterogeneous helium-4 superflow loop to realize entropy-decreasing processes. We also mention that the heat content of a superflow has an unusual dependence on flow velocity, which is an important factor contributing to the entropy-decreasing processes.

提交时间: 2016-09-21 点击量888下载量395 评论 0

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