发表机构
Kyoto University; The Open University of Japan; Institute for Molecular Science; Donostia International Physics Center (DIPC); IKERBASQUE, Basque Foundation for Science（京都大学; 日本开放大学; 分子科学研究所; 圣塞巴斯蒂安国际物理中心; 伊克尔巴斯科奎，巴斯克科学基金会）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文综述凝聚态中光子、声子、磁振子及混合激发的手性，指出无普遍度量，强调通过手性选择性相互作用理解手性，并认为杂化是操控手性的关键途径。
AI 中文摘要
手性已成为贯穿凝聚态物理的一个反复出现的概念，出现在从光学活性和手性声子到磁激发和混合准粒子等各类情境中。然而，随着其应用的扩展，这一概念常常与角动量、偏振、螺旋度和非互易性等相关概念交织在一起，从而模糊了其基于对称性的精确含义。尽管手性普遍与空间反演（$\mathcal{P}$）对称性破缺和时间反演（$\mathcal{T}$）对称性保持相关联，但其物理表现和定量表征在很大程度上取决于所考虑的系统与现象。在这篇综述中，我们考察了光子、声子、磁振子及混合激发中的手性。我们表明，尽管不存在普遍的手性度量，不同的物理系统允许不同的$\mathcal{P}$奇且$\mathcal{T}$偶的量来表征特定的手性现象。我们进一步论证，手性通常最好通过波、物质和准粒子之间的手性选择性相互作用来理解，而非作为孤立激发的固有属性。从这一视角出发，杂化为实现、转移和控制凝聚态系统中的手性提供了一个特别有前景的场所。
英文摘要
Chirality has become a recurring concept throughout condensed-matter physics, appearing in contexts ranging from optical activity and chiral phonons to magnetic excitations and hybrid quasiparticles. As its use has expanded, however, the concept has often become intertwined with related notions such as angular momentum, polarization, helicity, and nonreciprocity, obscuring its precise symmetry-based meaning. Although chirality is universally associated with broken spatial-inversion ($\mathcal{P}$) symmetry and preserved time-reversal ($\mathcal{T}$) symmetry, its physical manifestation and quantitative characterization strongly depend on the system and phenomenon under consideration. In this review, we examine chirality across photons, phonons, magnons, and hybrid excitations. We show that, while no universal measure of chirality exists, different physical systems admit different $\mathcal{P}$-odd and $\mathcal{T}$-even quantities that characterize specific chiral phenomena. We further argue that chirality is often best understood through chirality-selective interactions between waves, matter, and quasiparticles rather than as an intrinsic property of isolated excitations. From this perspective, hybridization provides a particularly promising setting for the emergence, transfer, and control of chirality in condensed-matter systems.
Comments13 pages, 2 figures
