Exceptional points are branch singularities on non-Hermitian eigenvalue manifolds and exhibit exotic topological phenomena associated with the winding of eigenvalues and eigenvectors. The confluence of non-Hermiticity and band topology generates new phenomena such as the non-Hermitian skin effect, which is...
Manipulating topological invariants is possible by modifying the global properties of optical devices to alter their band structures. This could be achieved by statically altering devices or dynamically reconfiguring devices with considerably different geometric parameters, even though it inhibits switching spee...
We establish non-Hermitian topological mechanics in one-dimensional (1D) and 2D lattices consisting of mass points connected by metabeams that lead to odd elasticity. Extended from the "non-Hermitian skin effect" in 1D systems, we demonstrate this effect in 2D lattices in which bulk elastic wave...
Non-Hermitian physics in photonics, plasmonics, and metamaterials Non-Hermitian topological photonics in both linear and nonlinear regimes Non-Hermitian quantum systems Exceptional points in optical and photonic systems and applications Wave propagation in...
Non-Hermitian photonics and topological photonics, as new research fields in optics, have attracted much attention in recent years, accompanying by a great deal of new physical concepts and novel effects emerging. The two fields are gradually crossed dur
arXiv:2407.20296v1 [cond-mat.mes-hall] 28 Jul 2024Hall transport in the topological non-Hermitian checkerboard latticePedro G. de Oliveira a∗ and Antˆ onio S. T. Pires aJuly 31, 2024a Department of Physics, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil.∗ pgo....
Enabled by crystalline inversion symmetry, these indicators allow us to short-cut the calculation of conventional non-Hermitian topological invariants. In particular, we express the three-dimensional winding number of point-gapped non-Hermitian systems, which is defined as an integral over the whole ...
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 that are detachable from the bulk bands. Here, we elucidate...
non‐Hermitian topological phase transitionsThe topological properties of a generalized non〩ermitian Su–Schrieffer–Heeger model are investigated and it is demonstrated that the non〩ermitian phase transition and the non〩ermitian skin effect can be induced by intraヽell asymmetric coupling under open...
Singularities of non-Hermitian systems typified by exceptional points (EPs) are critical for understanding non-Hermitian topological phases and trigger man... H Wang,YX Xiao,ZQ Zhang,... 被引量: 0发表: 0年 Non-Hermitian systems and topology: A transfer-matrix perspective Topological phases of ...