375 citations · 2.1k across the 51 of their papers we have counts for
4 papers · 1 filter
Topolectrical-circuit octupole insulator with topologically protected corner states
Jiacheng Bao, Deyuan Zou, Weixuan Zhang +3
Recent theoretical studies have extended the Berry phase framework to account for higher electric multipole moments, quadrupole and octupole topological phases have been proposed.…
Optically unstable phase from ion-ion interactions in an erbium doped crystal
Yu-Hui Chen, Sebastian P. Horvath, Jevon J. Longdell +1
We demonstrate an optical unstable phase for a laser driven erbium ion ensemble. The transmitted light through an erbium-doped yttrium orthosillicate crystal becomes dynamically un…
Observation of novel robust edge states without bulk-boundary correspondence in non-Hermitian quantum walks
Bo Wang, Tian Chen, Xiangdong Zhang
Recently, the study of non-Hermitian physics has attracted considerable attention. The modified bulk-boundary correspondence has been proposed to understand topological edge states…
Photonic quadrupole topological phases in zero-dimensional cavity with synthetic dimensions
Weixuan Zhang, Xiangdong Zhang
Quadrupole topological insulator, which supports robust corner states, has been recently demonstrated in two-dimensional (2D) spatial lattices. Here, we design the first photonic q…