6 citations · 24 across the 12 of their papers we have counts for
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A unified framework for exceptional point pairs in non-Hermitian two-level systems
Jung-Wan Ryu, Jae-Ho Han, Chang-Hwan Yi
Exceptional points (EPs) in non-Hermitian systems are branch singularities where eigenvalues and eigenvectors simultaneously coalesce, leading to rich topological phenomena beyond…
Non-orientable Exceptional Points in Twisted Boundary Systems
Jung-Wan Ryu, Jae-Ho Han, Moon Jip Park +2
Non-orientable manifolds, such as the Möbius strip and the Klein bottle, defy conventional geometric intuition through their twisted boundary conditions. As a result, topological d…
Decay Rates of Optical Modes Unveil the Island Structures in Mixed Phase Space
Chang-Hwan Yi, Barbara Dietz, Jae-Ho Han +1
We explore the decay rates of optical modes in asymmetric microcavities with mixed phase space across a wide range of wavelengths that extend deep into the semiclassical, i.e., sho…
Complex energy structures of exceptional point pairs in two level systems
Jung-Wan Ryu, Chang-Hwan Yi, Jae-Ho Han
We investigate the topological properties of multiple exceptional points in non-Hermitian two-level systems, emphasizing vorticity as a topological invariant arising from complex e…
Realization of geometric phase topology induced by multiple exceptional points
Jung-Wan Ryu, Jae-Ho Han, Chang-Hwan Yi
Non-Hermitian systems have Riemann surface structures of complex eigenvalues that admit singularities known as exceptional points. Combining with geometric phases of eigenstates gi…
Spontaneous emission decay and excitation in photonic time crystals
Jagang Park, Kyungmin Lee, Ruo-Yang Zhang +10
Over the last few decades, the predominant strategies for controlling spontaneous emission have involved tailoring the spatial surroundings of quantum emitters or atoms to create r…
Impact of non-Hermitian Mode interaction on Inter-cavity Light transfer
Hyeon-Hye Yu, Sunjae Gwak, Jinhyeok Ryu +4
Understanding inter-site mutual mode interaction in coupled physical systems is essential to comprehend large compound systems as this local interaction determines the successive m…