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arXiv 2203.05039cond-mat.dis-nn
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对“液体、固体和玻璃中的形变、弛豫和对称性破缺:统一拓扑场论“的评论

Comment on "Deformations, relaxation and broken symmetries in liquids, solids and glasses: a unified topological field theory"

Taras Bryk, Walter Schirmacher, Giancarlo Ruocco

摘要:

我们讨论了最近发表的[物理学评论E { \bf 105},034108(2022)]中液体、固体和玻璃的场论方法,其目的是用一种通用的量子形式主义来描述这些材料。我们认为,这样的量子形式主义是不适用于经典液体,和结果,这在很大程度上依赖于从量子流体借用相弛豫的概念,矛盾的经典液体的流体动力学理论。特别是,作者错过了重要的粒子数守恒定律和密度波动作为流体动力学慢变量。相反,作者引用戈德斯通玻色子作为基本的流体动力学激发。我们指出,在经典液体中没有破缺的连续对称性,因此没有戈德斯通玻色子。作者声称,戈德斯通玻色子将是液体中声音存在的原因,而不是粒子数和动量守恒的结果,这是流体力学教科书中有很好记载的事实。

英文摘要:

We discuss a field-theoretical approach to liquids, solids and glasses, published recently [Phys.Rev.E {\bf105}, 034108 (2022)], which aims to describe these materials in a common quantum formalism. We argue that such quantum formalism is not applicable to classical liquids, and the results presented, which rely heavily on the concept of phase relaxation borrowed from quantum fluids, contradict the known hydrodynamic theory of classical liquids. In particular, the authors miss the important particle-number conservation law and the density fluctuations as hydrodynamic slow variable. Instead, the authors invoke Goldstone bosons as elementary hydrodynamic excitations. We point out that in a classical liquid there are no broken continuous symmetries and consequently no Goldstone bosons. The authors claim that the Goldstone bosons would be responsible for the existence of sound in liquids, instead of resulting from combined particle-number and momentum conservation, a fact well documented in fluid-mechanics textbooks.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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