21 citations · 41 across the 5 of their papers we have counts for
5 papers
Subspace-Protected Topological Phases and Bulk-Boundary Correspondence
Kenji Shimomura, Ryo Takami, Daichi Nakamura +1
While tremendous research has revealed that symmetry enriches topological phases of matter, more general principles that protect topological phases have yet to be explored. In this…
Exceptional deficiency of non-Hermitian systems
Zhen Li, Xulong Wang, Rundong Cai +5
Exceptional points (EPs) are non-Hermitian singularities associated with the coalescence of individual eigenvectors accompanied by the degeneracy of their complex energies. Here, w…
-theory classification of Wannier localizability and detachable topological boundary states
Ken Shiozaki, Daichi Nakamura, Kenji Shimomura +2
A hallmark of certain topology, including the Chern number, is the obstruction to constructing exponentially localized Wannier functions in the bulk bands. Conversely, other types…
Non-Hermitian Origin of Detachable Boundary States in Topological Insulators
Daichi Nakamura, Ken Shiozaki, Kenji Shimomura +2
While topology can impose obstructions to exponentially localized Wannier functions, certain topological insulators are exempt from such Wannier obstructions. The absence of the Wa…
General criterion for non-Hermitian skin effects and Application: Fock space skin effects in many body systems
Kenji Shimomura, Masatoshi Sato
Non-Hermiticity enables macroscopic accumulation of bulk states, named non-Hermitian skin effects. The non-Hermitian skin effects are well-established for single-particle systems,…