Non-Hermitian systems display remarkable response effects that reflect a variety of distinct spectral scenarios, such as exceptional points where the eigen... S Bid,H Schomerus 被引量: 0发表: 2024年 Non-Hermitian Physics andTopological Phenomena inConvective Thermal Metamaterials Non-Hermitian physics...
Spectral topology fundamentally affects the parallel-transport behaviours of eigenvectors of a non-Hermitian Hamiltonian. Exceptional points are branch singularities on non-Hermitian eigenvalue manifolds and exhibit exotic topological phenomena associated with the winding of eigenvalues and eigenvectors. ...
Recently, it has been found that non-Hermitian physics and topological phenomena can be implemented in purely conductive thermal metamaterials. However, conduction alone is not omnipotent due to the missing of degrees of freedom. Heat convection, accompanying with conduction, is capable of realizing a...
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 an environment and system, we demonstrate that anomalous ...
Exceptional points (EPs) arising in non-Hermitian systems have led to a variety of intriguing wave phenomena, and have been attracting increased interest in various physical platforms. In this Review, we highlight the latest fundamental advances in the context of EPs in various nanoscale systems, ...
In particular, we elucidate how the paramount and genuinely NH concept of exceptional degeneracies, at which both eigenvalues and eigenvectors coalesce, leads to phenomena drastically distinct from the familiar Hermitian realm. An immediate consequence is the ubiquitous occurrence of nodal NH topological ...
题目:Quantum Non-Hermitian Phenomena with Open Baths | 北京大学量子材料科学中心 时间:2024-04-17 15:00 报告人:胡颖 山西大学 主办方:北京大学量子材料科学中心 直播链接:蔻享学术摘要:While enchanting non-Hermitian properties unattainable in Hermitian systems are widely revealed, genuine quantum non-Hermitia...
Nearly one century after the birth of quantum mechanics, parity–time symmetry is revolutionizing and extending quantum theories to include a unique family of non-Hermitian Hamiltonians. While conceptually striking, experimental demonstration of parity–time symmetry remains unexplored in quantum electronic ...
Non-Hermitian physics has greatly enriched our understanding of nonequilibrium phenomena and uncovered novel effects such as the non-Hermitian skin effect (NHSE) that has profoundly revolutionized the field. NHSE has been predicted in systems with nonreciprocal couplings which, however, are challenging ...
Spin–orbit coupling is an essential mechanism underlying quantum phenomena such as the spin Hall effect and topological insulators1. It has been widely studied in well-isolated Hermitian systems, but much less is known about the role dissipation plays in spin–orbit-coupled systems2. Here we impl...