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arXiv 1908.06977hep-thcond-mat.str-el
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超流体作为更高形式的反常现象

Superfluids as Higher-form Anomalies

Luca V. Delacrétaz, Diego M. Hofman, Grégoire Mathys

摘要:

我们重铸超流流体动力学作为一个系统的流体动力学理论与新兴的异常高形式的对称性。更高形式的电荷计算超流体的缠绕平面-其本构关系取代了传统超流体流体力学的约瑟夫森关系。这个公式把所有的流体动力学方程放在同等的基础上。反常的沃德恒等式可以作为另一个出发点来证明戈德斯通玻色子的存在,而不涉及自发对称性破缺。这提供了另一种表征朗道相变在更高形式的对称性和它们的异常,而不是如何实现的对称性。这种处理更一般,特别是包括BKT转换的情况。作为这种形式的应用,我们建立了常规(0-形式)和1-形式超流体的流体力学理论。

英文摘要:

We recast superfluid hydrodynamics as the hydrodynamic theory of a system with an emergent anomalous higher-form symmetry. The higher-form charge counts the winding planes of the superfluid -- its constitutive relation replaces the Josephson relation of conventional superfluid hydrodynamics. This formulation puts all hydrodynamic equations on equal footing. The anomalous Ward identity can be used as an alternative starting point to prove the existence of a Goldstone boson, without reference to spontaneous symmetry breaking. This provides an alternative characterization of Landau phase transitions in terms of higher-form symmetries and their anomalies instead of how the symmetries are realized. This treatment is more general and, in particular, includes the case of BKT transitions. As an application of this formalism we construct the hydrodynamic theories of conventional (0-form) and 1-form superfluids.

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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