5 papers
Global bifurcations and basin geometry of the nonlinear non-Hermitian skin effect
Heng Lin, Yunyao Qi, Gui-Lu Long
We study a continuum Hatano--Nelson model with a saturating nonlinear nonreciprocity and analyze its stationary states via the associated phase-space flow. We uncover a global scen…
Exact Mobility Edges in a Disorder-Free Dimerized Stark Lattice with Effective Unbounded Hopping
Yunyao Qi, Heng Lin, Quanfeng Lu +2
We propose a disorder-free one-dimensional single-particle Hamiltonian hosting an exact mobility edge (ME), placing the system outside the assumptions of no-go theorems regarding u…
Imaginary-Stark Skin Effect
Heng Lin, Jinghui Pi, Yunyao Qi +3
A unique phenomenon in non-Hermitian systems is the non-Hermitian skin effect (NHSE), namely the boundary localization of continuous-spectrum eigenstates. However, studies on the N…
Imaginary gap-closed points and dynamics in a class of dissipative systems
Shicheng Ma, Heng Lin, Jinghui Pi
We investigate imaginary gap-closed (IGC) points and their associated dynamics in dissipative systems. In a general non-Hermitian model, we derive the equation governing the IGC po…
Extended imaginary gauge transformation in a general nonreciprocal lattice
Yunyao Qi, Jinghui Pi, Yuquan Wu +3
Imaginary gauge transformation (IGT) provides a clear understanding of the non-Hermitian skin effect by transforming the non-Hermitian Hamiltonians with real spectra into Hermitian…