1.2k citations · 6.5k across the 69 of their papers we have counts for
70 papers
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…
Direct observation of zero modes in a non-Hermitian nanocavity array
Flore Hentinger, Melissa Hedir, Bruno Garbin +5
Zero modes are symmetry protected ones whose energy eigenvalues have zero real parts. In Hermitian arrays, they arise as a consequence of the sublattice symmetry, implying that the…
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…