Quantum Many-Body Scars: A Quasiparticle Perspective

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

Annual Review of Condensed Matter Physics Pub Date : 2022-06-23 DOI:10.1146/annurev-conmatphys-031620-101617

A. Chandran, Thomas Iadecola, V. Khemani, R. Moessner

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引用次数: 68

Abstract

Weakly interacting quasiparticles play a central role in the low-energy description of many phases of quantum matter. At higher energies, however, quasiparticles cease to be well defined in generic many-body systems owing to a proliferation of decay channels. In this review, we discuss the phenomenon of quantum many-body scars, which can give rise to certain species of stable quasiparticles throughout the energy spectrum. This goes along with a set of unusual nonequilibrium phenomena including many-body revivals and nonthermal stationary states. We provide a pedagogical exposition of this physics via a simple yet comprehensive example, that of a spin-1 XY model. We place our discussion in the broader context of symmetry-based constructions of many-body scar states, projector embeddings, and Hilbert space fragmentation. We conclude with a summary of experimental progress and theoretical puzzles. Expected final online publication date for the Annual Review of Condensed Matter Physics, Volume 14 is March 2023. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

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量子多体伤痕:准粒子视角

弱相互作用的准粒子在量子物质许多相的低能描述中起着核心作用。然而，在更高的能量下，由于衰变通道的扩散，准粒子在一般的多体系统中不再有很好的定义。在这篇综述中，我们讨论了量子多体伤痕现象，它可以在整个能谱中产生某些种类的稳定准粒子。这伴随着一系列不同寻常的非平衡现象，包括许多天体复活和非热稳态。我们通过一个简单而全面的例子，即自旋-1 XY模型，对这种物理学进行了教学阐述。我们将我们的讨论放在更广泛的背景下，即许多身体疤痕状态的基于对称的构造、投影嵌入和希尔伯特空间碎片。最后，我们总结了实验进展和理论困惑。《凝聚态物理学年度评论》第14卷预计最终在线出版日期为2023年3月。请参阅http://www.annualreviews.org/page/journal/pubdates用于修订估算。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.