25 citations · 107 across the 8 of their papers we have counts for
8 papers
Robust zero modes in non-Hermitian systems without global symmetries
Jose D. H. Rivero, Courtney Fleming, Bingkun Qi +2
We present an approach to achieve zero modes in lattice models that do not rely on any symmetry or topology of the bulk, which are robust against disorder in the bulk of any type a…
Analysis of Dirac exceptional points and their isospectral Hermitian counterparts
Jose H. D. Rivero, Liang Feng, Li Ge
Recently, a Dirac exceptional point (EP) was reported in a non-Hermitian system. Unlike a Dirac point in Hermitian systems, this Dirac EP has coalesced eigenstates in addition to t…
Imaginary gauge transformation in momentum space and Dirac exceptional point
Jose H. D. Rivero, Liang Feng, Li Ge
An imaginary gauge transformation is at the core of the non-Hermitian skin effect. Here we show that such a transformation can be performed in momentum space as well, which reveals…
Insight of the Green's function as a defect state in a boundary value problem
Jose D. H. Rivero, Li Ge
A new perspective of the Green's function in a boundary value problem as the only eigenstate in an auxiliary formulation is introduced. In this treatment, the Green's function can…
Pseudo-chirality: a manifestation of Noether's theorem in non-Hermitian systems
Jose D. H. Rivero, Li Ge
Noether's theorem relates constants of motion to the symmetries of the system. Here we investigate a manifestation of Noether's theorem in non-Hermitian systems, where the inner pr…
Origin of robust exceptional points: a restricted bulk zero mode
Jose D. H. Rivero, Li Ge
Recently a type of robust exceptional points was found that is insensitive to the coupling disorder in the bulk. Here we show that a disparity emerges when the number of coupled ca…
Time-reversal invariant scaling of light propagation in one-dimensional non-Hermitian systems
Jose Hernandez Rivero, Li Ge
Light propagation through a normal medium is determined not only by the real part of the refractive index but also by its imaginary part, which represents optical gain and loss. Th…
Chiral symmetry in non-Hermitian systems: product rule and Clifford algebra
Jose D. H. Rivero, Li Ge
Chiral symmetry provides the symmetry protection for a large class of topological edge states. It exists in non-Hermitian systems as well, and the same anti-commutation relation be…