The fermion doubling theorem plays a pivotal role in Hermitian topological materials. It
states, for example, that Weyl points must come in pairs in three-dimensional semimetals …

Exceptional points are universal level degeneracies induced by non-Hermiticity. Whereas
past decades witnessed their new physics, the unified understanding has yet to be obtained …

Recently, topological quantum states of non-Hermitian systems, exhibiting rich, new exotic
states, have attracted great attention in condensed-matter physics. As for the demonstration …

We study a new class of non-Hermitian topological phases in three dimensions in the
absence of any symmetry, where the topological robust band degeneracies are Hopf-link …

We classify topological defects in non-Hermitian systems with point, real, and imaginary
gaps for all the Bernard-LeClair classes or generalized Bernard-LeClair classes in all …

Non-Hermitian (NH) Hamiltonians have become an important asset for the effective
description of various physical systems that are subject to dissipation. Motivated by recent …

We study the interplay of disorder and band-structure topology in a Weyl semimetal with a
tilted conical spectrum around the Weyl points. The spectrum of particles is given by the …

Despite recent extensive studies of the non-Hermitian topology, understanding interaction
effects is left as a crucial question. In this paper, we address interaction effects on …

The hallmark of symmetry-protected topological phases is the existence of anomalous
boundary states, which can only be realized with the corresponding bulk system. In this …

In previous studies, the topological invariants of one-dimensional non-Hermitian systems
have been defined in open boundary condition (OBC) to satisfy the bulk-boundary …