Direct Measurement of Topological Properties of an Exceptional Parabola

Tang, WY; Ding, K; Ma, GC

Ma, GC (corresponding author), Hong Kong Baptist Univ, Dept Phys, Kowloon Tong, Hong Kong, Peoples R China.; Ding, K (corresponding author), Fudan Univ, Dept Phys, State Key Lab Surface Phys, Shanghai 200438, Peoples R China.; Ding, K (corresponding author), Fudan Univ, Key Lab Micro & Nano Photon Struct, Minist Educ, Shanghai 200438, Peoples R China.

PHYSICAL REVIEW LETTERS, 2021; 127 (3):

Abstract

Non-Hermitian systems can produce branch singularities known as exceptional points (EPs). Different from singularities in Hermitian systems, the topol......

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