3 papers
cond-mat.mes-hall2024
Nonlinear Hall effects with an exceptional ring
Fang Qin, Ruizhe Shen, Ching Hua Lee
In non-Hermitian band structures, exceptional points generically form gapless lines or loops that give rise to extensively many defective eigenstates. In this work, we investigate…
cond-mat.quant-gas2024
Enhanced many-body quantum scars from the non-Hermitian Fock skin effect
Ruizhe Shen, Fang Qin, Jean-Yves Desaules +2
In contrast with extended Bloch waves, a single particle can become spatially localized due to the so-called skin effect originating from non-Hermitian pumping. Here we show that i…
cond-mat.mes-hall2024
Light-enhanced nonlinear Hall effect
Fang Qin, Rui Chen, Ching Hua Lee
It is well known that a nontrivial Chern number results in quantized Hall conductance. What is less known is that, generically, the Hall response can be dramatically different from…