Eigenvalue topology of non-Hermitian band structures in two and three dimensions
Eigenvalue topology of non-Hermitian band structures in two and three dimensions
In the band theory for non-Hermitian systems, the energy eigenvalues, which are complex, can exhibit non-trivial topology which is not present in Hermitian systems. In one dimension, it was recently noted theoretically and demonstrated experimentally that the eigenvalue topology is classified by the braid group. The classification of eigenvalue topology …