Direct measurement of a non-Hermitian topological invariant in a hybrid light-matter system

• Main Authors: Su, Rui, Estrecho, Eliezer, Biegańska, Dąbrówka, Huang, Yuqing, Wurdack, Matthias, Pieczarka, Maciej, Truscott, Andrew G., Liew, Timothy Chi Hin, Ostrovskaya, Elena A., Xiong, Qihua
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2022
• Subjects: Science::Physics::Optics and light; Superfluidity; Exceptional Points
• Online Access: https://hdl.handle.net/10356/156276
• Institution: Nanyang Technological University

Topology is central to understanding and engineering materials that display robust physical phenomena immune to imperfections. Different topological phases of matter are characterized by topological invariants. In energy-conserving (Hermitian) systems, these invariants are determined by the winding...