221 citations · 602 across the 8 of their papers we have counts for
8 papers
Scaling of quantum Fisher information for quantum exceptional point sensors
Chun-Hui Liu, Fu Li, Shengwang Du +3
In recent years, significant progress has been made in utilizing the divergence of spectrum response rate at the exceptional point (EP) for sensing in classical systems, while the…
Anomalous second-order skin modes in Floquet non-Hermitian systems
Chun-Hui Liu, Haiping Hu, Shu Chen +1
The non-Hermitian skin effect under open boundary conditions is widely believed to originate from the intrinsic spectral topology under periodic boundary conditions. If the eigensp…
Symmetry and topological classification of Floquet non-Hermitian systems
Chun-Hui Liu, Haiping Hu, Shu Chen
Recent experimental advances in Floquet engineering and controlling dissipation in open systems have brought about unprecedented flexibility in tailoring novel phenomena without an…
Exact solution of non-Hermitian systems with generalized boundary conditions: size-dependent boundary effect and fragility of skin effect
Cui-Xian Guo, Chun-Hui Liu, Xiao-Ming Zhao +2
Systems with non-Hermitian skin effects are very sensitive to the imposed boundary conditions and lattice size, and thus an important question is whether non-Hermitian skin effects…
Information constraint in open quantum systems
Chun-Hui Liu, Shu Chen
We propose an effect called information constraint which is characterized by the existence of different decay rates of signal strengths propagating along opposite directions. It is…
Helical damping and anomalous critical non-Hermitian skin effect
Chun-Hui Liu, Kai Zhang, Zhesen Yang +1
Non-Hermitian skin effect and critical skin effect are unique features of non-Hermitian systems. In this Letter, we study an open system with its dynamics of single-particle correl…
Topological classification of defects in non-Hermitian systems
Chun-Hui Liu, Shu Chen
We classify topological defects in non-Hermitian systems with point gap, real gap and imaginary gap for all the Bernard-LeClair classes or generalized Bernard-LeClair classes in al…
Topological classification of non-Hermitian systems with reflection symmetry
Chun-Hui Liu, Hui Jiang, Shu Chen
We classify topological phases of non-Hermitian systems in the Altland-Zirnbauer classes with an additional reflection symmetry in all dimensions. By mapping the non-Hermitian syst…