Zobrazeno 1 - 10
of 170
pro vyhledávání: '"KAWABATA, Kohei"'
Point-gap topological phases of non-Hermitian systems exhibit exotic boundary states that have no counterparts in Hermitian systems. Here, we develop classification of second-order point-gap topological phases with reflection symmetry. Based on this
Externí odkaz:
http://arxiv.org/abs/2411.06898
The interplay between non-Hermiticity and disorder gives rise to unique universality classes of Anderson transitions. Here, we develop a field-theoretical description of non-Hermitian disordered systems based on fermionic replica nonlinear sigma mode
Externí odkaz:
http://arxiv.org/abs/2411.11878
Symmetry of non-Hermitian matrices underpins many physical phenomena. In particular, chaotic open quantum systems exhibit universal bulk spectral correlations classified on the basis of time-reversal symmetry$^{\dagger}$ (TRS$^{\dagger}$), coinciding
Externí odkaz:
http://arxiv.org/abs/2410.24043
We consider quantum transport on a tight-binding model on the Bethe lattice of a finite generation, or the Cayley tree, which may model the energy transport in a light-harvesting molecule. As a new feature to analyze the quantum transport, we add com
Externí odkaz:
http://arxiv.org/abs/2409.01873
We investigate the monitored quantum dynamics of Gaussian mixed states and derive the universal Fokker-Planck equations that govern the stochastic time evolution of entire density-matrix spectra, obtaining their exact solutions. From these equations,
Externí odkaz:
http://arxiv.org/abs/2408.16974
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 of topology do not necessarily impose Wannier obstructions. Remarkably
Externí odkaz:
http://arxiv.org/abs/2407.18273
While topology can impose obstructions to exponentially localized Wannier functions, certain topological insulators are exempt from such Wannier obstructions. The absence of the Wannier obstructions can further accompany topological boundary states t
Externí odkaz:
http://arxiv.org/abs/2407.09458
Non-Hermiticity leads to distinctive topological phenomena absent in Hermitian systems. However, connection between such intrinsic non-Hermitian topology and Hermitian topology has remained largely elusive. Here, considering the bulk and boundary as
Externí odkaz:
http://arxiv.org/abs/2405.10015
Autor:
Hamanaka, Shu, Kawabata, Kohei
The non-Hermitian skin effect, anomalous localization of an extensive number of eigenstates induced by nonreciprocal dissipation, plays a pivotal role in non-Hermitian topology and significantly influences the open quantum dynamics. However, its genu
Externí odkaz:
http://arxiv.org/abs/2401.08304
Publikováno v:
Phys. Rev. Research 6, 023303 (2024)
Random matrix theory is a powerful tool for understanding spectral correlations inherent in quantum chaotic systems. Despite diverse applications of non-Hermitian random matrix theory, the role of symmetry remains to be fully established. Here, we co
Externí odkaz:
http://arxiv.org/abs/2401.05044