Recently, optical nonlinearity has emerged as a tool for tailoring topological and non-Hermitian (NH) properties, promising fast manipulation of topological phases. In this work, we observe topologically protected NH phase transitions driven by optical nonlinearity in a silicon nanophotonic Floquet ...
Edge states and topological phases in non-hermitian systems. Phys. Rev. B, 84:205128, Nov 2011.Esaki, K.; Sato, M.; Hasebe, K.; Kohmoto, M. Edge states and topological phases in non-Hermitian systems. Phys. Rev. B 2011, 84, 205128:1-205128:19....
We treat this non-unitary evolution using the non-Hermitian Hamiltonian approach41,42. We establish that for a 1D split-step quantum walk (SSQW), the topological phases persist as long as the spectrum of the non-Hermitian Hamiltonian is real. In other words, as long as the underlying non-...
Here, we propose a scheme to retrieve the BBC and establish a complete description to the topological phases of the periodically driven non-Hermitian system both with and without the translation invariance. The demonstration of our method in the non-Hermitian Su-Schrieer-Heeger model shows that ...
The introduction of topology in condensed-matter physicslead to the discovery of topological phase transitions and materials as topological insulators. Phase transitions in the symmetry of non-Hermitian systems describe the transition to on-average conserved energyand new topological phases. Bulk ...
L. Hughes. Absence of topological insulator phases in non-Hermitian P T -symmetric Hamiltonians. Phys Rev B 84:153101, 2011. doi:10.1103/PhysRevB.84.153101.Y. C. Hu, T. L. Hughes, Absence of topological insulator phases in non-Hermitian PT- symmetric Hamiltonians. Phys. Rev. B 84, ...
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
Topological phase in a non-Hermitian PT symmetric system •We discuss a novel topological aspect for the non-Hermitian Aubry–Andre model.•We show that there exists topologically nontrivial edge states with ... C Yuce - 《Physics Letters A》 被引量: 12发表: 2015年 Nontrivial Berry phase...
Inspired by recent advances in engineering non-Hermiticity in artificial systems, more and more efforts are made to explore non-Hermitian topological phases [8-10]. The interplay among topology, disorder, and non-Hermiticity may induce unknown physical phenomena. In a recent study, Zhang et al. ...
Hermitian topologies originating from non-Hermitian braidings Nevertheless, we show the bulk-boundary correspondence between the bulk non-Hermitian braiding and boundary zero modes of the Hermitian topological insulators. Finally, we construct typical topological phases with non-Hermitian braidings, which.....