Symmetry and Topology of Exceptional Points

Yoshida Tsuneya, Hatsugai Yasuhiro

doi:10.11316/butsuri.77.4_222

Bibliographic Information

Other Title

非エルミート系における例外点のトポロジーと対称性

Abstract

<p>Non-Hermitian topology attracts broad interests in condensed matter physics as it induces novel phenomena. A prime example is exceptional points where the non-Hermiticity violates diagonalizability of the Hamiltonian. Here, we report a novel type of exceptional points arises from interplay between symmetry and non-Hermiticity: symmetry-protected exceptional rings and symmetry-protected exceptional surfaces. We also exemplify the emergence of the symmetry-protected exceptional points, rings, and surfaces for two distinct systems: strongly correlated fermions and spring-mass models governed by the Newton equation.</p>

Journal

Butsuri

Butsuri 77 (4), 222-227, 2022-04-05

The Physical Society of Japan

Details 詳細情報について

CRID: 1390291767873889920

DOI: 10.11316/butsuri.77.4_222

ISSN: 24238872; 00290181

Text Lang: ja

Data Source

JaLC
KAKEN

Abstract License Flag: Disallowed

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