328 citations · 1.1k across the 17 of their papers we have counts for
4 papers · 1 filter
Topological phases and nonreciprocal edge states in non-Hermitian Floquet Insulators
Mengyao Li, Xiang Ni, Matthew Weiner +2
Topological phases in quantum and classical systems have been of significant recent interest due to their fascinating physical properties. While a range of different mechanisms to…
Observation of Bulk Polarization Transitions and Higher-Order Embedded Topological Eigenstates for Sound
Xiang Ni, Matthew Weiner, Andrea Alù +1
Topological systems are inherently robust to disorder and continuous perturbations, resulting in dissipation-free edge transport of electrons in quantum solids, or reflectionless g…
Pseudospin-valley coupled edge states in a photonic topological insulator
Yuhao Kang, Xiaojun Cheng, Xiang Ni +2
Pseudo-spin and valley degrees of freedom (DOFs) engineered in photonic analogues of topological insulators (TI) provide potential approaches to optical encoding and robust signal…
Exceptional points in topological edge spectrum of PT symmetric domain walls
Xiang Ni, Daria Smirnova, Alexander Poddubny +3
We demonstrate that the non-Hermitian parity-time (PT) symmetric interfaces formed between amplifying and lossy crystals support dissipationless edge states. These PT edge states e…