期刊
PHYSICAL REVIEW LETTERS
卷 123, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.123.054301
关键词
-
资金
- MURI Center for Dynamic Magneto-Optics via the Air Force Office of Scientific Research (AFOSR) [FA9550-14-1-0040]
- Army Research Office (ARO) [W911NF-18-1-0358]
- Asian Office of Aerospace Research and Development (AOARD) [FA2386-18-1-4045]
- Japan Science and Technology Agency (JST) (Q-LEAP program)
- Japan Science and Technology Agency (JST) (CREST) [JPMJCR1676]
- Japan Society for the Promotion of Science (JSPS) (JSPS-RFBR) [17-52-50023]
- Japan Society for the Promotion of Science (JSPS) (JSPS-FWO) [VS.059.18N]
- RIKEN-AIST Challenge Research Fund
- John Templeton Foundation
- Australian Research Council
Recently, it was shown that surface electromagnetic waves at interfaces between continuous homogeneous media (e.g., surface plasmon-polaritons at metal-dielectric interfaces) have a topological origin [K. Y. Bliokh et al., Nat. Commun. 10, 580 (2019)]. This is explained by the nontrivial topology of the non-Hermitian photon helicity operator in the Weyl-like representation of Maxwell equations. Here we analyze another type of classical waves: longitudinal acoustic waves corresponding to spinless phonons. We show that surface acoustic waves, which appear at interfaces between media with opposite-sign densities, can be explained by similar topological features and the bulk-boundary correspondence. However, in contrast to photons, the topological properties of sound waves originate from the non-Hermitian four-momentum operator in the Klein-Gordon representation of acoustic fields.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据