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arXiv 1906.12293cond-mat.stat-mechhep-thquant-ph
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对称性破缺的广义判据。量子时间晶体的一种策略

Generalized criteria of symmetry breaking. A strategy for quantum time crystals

Carlo Heissenberg, Franco Strocchi

摘要:

本文的目的是提出一个自发对称性破缺的判据,该判据参考了由一个对称不变态定义的纯相的性质。在标准方法的基础上,通过避免任何对基态的参考,该标准适用于更广泛的模型类别。一个有趣的应用是打破时间翻译。事实上,我们讨论明确的理论模型,表现出量子时间晶体的原型特征,而不需要一个依赖于时间的哈密顿量。

英文摘要:

The aim of this paper is to propose a criterion of spontaneous symmetry breaking that makes reference to the properties of pure phases defined by a translationally invariant state. By avoiding any reference to the ground state, at the basis of the standard approach, this criterion applies to a wider class of models. An interesting application is the breaking of time translations. Indeed, we discuss explicit theoretical models which exhibit the prototypical features of quantum time crystals, without the need of a time-dependent Hamiltonian.

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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