离散时间晶体

IF 14.3 1区物理与天体物理 Q1 PHYSICS, CONDENSED MATTER

Annual Review of Condensed Matter Physics Pub Date : 2019-05-30 DOI:10.1146/annurev-conmatphys-031119-050658

D. Else, C. Monroe, C. Nayak, N. Yao

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引用次数: 180

摘要

实验的进步已经允许探索几乎孤立的量子多体系统，其与外部槽的耦合非常弱。这类系统中特别有趣的一类是那些在它们自己孤立的量子动力学下不热化的系统。在这篇综述中，我们强调了这种系统表现出新的物质非平衡相的可能性。我们特别关注离散时间晶体，这是一种以自发破缺离散时间平移对称性为特征的物质的多体相。我们从几个角度给出了离散时间晶体的定义，强调它们是一种由多体相互作用稳定的非平衡现象，在非相互作用系统中没有类似物。我们解释了几个离散时间晶体模型背后的理论，并在不同的实验背景下比较了几个最近的实现。

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Discrete Time Crystals

Experimental advances have allowed for the exploration of nearly isolated quantum many-body systems whose coupling to an external bath is very weak. A particularly interesting class of such systems is those that do not thermalize under their own isolated quantum dynamics. In this review, we highlight the possibility for such systems to exhibit new nonequilibrium phases of matter. In particular, we focus on discrete time crystals, which are many-body phases of matter characterized by a spontaneously broken discrete time-translation symmetry. We give a definition of discrete time crystals from several points of view, emphasizing that they are a nonequilibrium phenomenon that is stabilized by many-body interactions, with no analog in noninteracting systems. We explain the theory behind several proposed models of discrete time crystals, and compare several recent realizations, in different experimental contexts.

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来源期刊

Annual Review of Condensed Matter Physics PHYSICS, CONDENSED MATTER-

CiteScore

47.40

自引率

0.90%

发文量

期刊介绍： Since its inception in 2010, the Annual Review of Condensed Matter Physics has been chronicling significant advancements in the field and its related subjects. By highlighting recent developments and offering critical evaluations, the journal actively contributes to the ongoing discourse in condensed matter physics. The latest volume of the journal has transitioned from gated access to open access, facilitated by Annual Reviews' Subscribe to Open initiative. Under this program, all articles are now published under a CC BY license, ensuring broader accessibility and dissemination of knowledge.