297 citations · 1.2k across the 35 of their papers we have counts for
5 papers · 1 filter
Mapping and manipulation of topological singularities: from photonic graphene to T-graphene
Sihong Lei, Shiqi Xia, Junqian Wang +6
Topological singularities (TSs) in momentum space give rise to intriguing fundamental phenomena as well as unusual material properties, attracting a great deal of interest in the p…
Photonic p-orbital higher-order topological insulators
Yahui Zhang, Domenico Bongiovanni, Ziteng Wang +9
The orbital degrees of freedom play a pivotal role in understanding fundamental phenomena in solid-state materials as well as exotic quantum states of matter including orbital supe…
Topological flatband loop states in fractal-like photonic lattices
Limin Song, Yuqing Xie, Shiqi Xia +4
Noncontractible loop states (NLSs) are recently realized topological entity in flatband lattices, arising typically from band touching at a point where a flat band intersects one o…
Persistent homology analysis of a generalized Aubry-André-Harper model
Yu He, Shiqi Xia, Dimitris G. Angelakis +3
Observing critical phases in lattice models is challenging due to the need to analyze the finite time or size scaling of observables. We study how the computational topology techni…
Robustness versus sensitivity in non-Hermitian topological lattices probed by pseudospectra
I. Komis, D. Kaltsas, S. Xia +3
Non-Hermitian topological systems simultaneously posses two antagonistic features: ultra sensitivity due to exceptional points and robustness of topological zero energy modes, and…