72 citations · 234 across the 7 of their papers we have counts for
7 papers
Simple harmonic oscillation in non-Hermitian SSH chain at exceptional point
K. L. Zhang, P. Wang, G. Zhang +1
The balance of gain and loss in an open system may maintain certain Hermitian dynamical behaviors, which can be hardly observed in a popular Hermitian system. In this paper, we sys…
Topological nodal points in two coupled SSH chains
Ci. Li, Sen. Lin, Gang. Zhang +1
We study two coupled Su-Schrieffer-Heeger (SSH) chains system, which is shown to contain rich quantum phases associated with topological invariants protected by symmetries. In the…
Wave emission and absorption at spectral singularities
P. Wang, L. Jin, G. Zhang +1
We studied the critical dynamics of spectral singularities. The system investigated is a coupled resonator array with a side-coupled loss (gain) resonator. For a gain resonator, th…
Chern number in Ising models with spatially modulated real and complex fields
C. Li, G. Zhang, Z. Song
We study an one-dimensional transverse field Ising model with additional periodically modulated real and complex fields. It is shown that both models can be mapped on a pseudo spin…
Transmission phase lapse in the non-Hermitian Aharonov-Bohm interferometer near the spectral singularity
G. Zhang, X. Q. Li, X. Z. Zhang +1
We study the effect of PT-symmetric imaginary potentials embedded in the two arms of an Aharonov-Bohm interferometer on the transmission phase by finding an exact solution for a co…
Asymmetric transmission through a flux-controlled non-Hermitian scattering center
X. Q. Li, X. Z. Zhang, G. Zhang +1
We study the possibility of asymmetric transmission induced by a non-Hermitian scattering center embedded in a one-dimensional waveguide, motivated by the aim of realizing quantum…
Conventional quantum phase transition driven by complex parameter in non-Hermitian PT-symmetric Ising model
C. Li, G. Zhang, X. Z. Zhang +1
A conventional quantum phase transition (QPT) can be accessed by varying a real parameter at absolute zero temperature. Motivated by the discovery of the pseudo-Hermiticity of non-…