Manipulation of Weyl Points in Reciprocal and Nonreciprocal Mechanical Lattices
Mingsheng Tian, Ivan Velkovsky, Tao Chen, Feng-Xiao Sun, Qiongyi He, Bryce Gadway
Abstract
We introduce feedback-measurement technologies to achieve flexible control of Weyl points and conduct the first experimental demonstration of Weyl type I-II transition in mechanical systems. We demonstrate that non-Hermiticity can expand the Fermi arc surface states from connecting Weyl points to Weyl rings, and lead to a localization transition of edge states influenced by the interplay between band topology and the non-Hermitian skin effect. Our findings offer valuable insights into the design and manipulation of Weyl points in mechanical systems, providing a promising avenue for manipulating topological modes in non-Hermitian systems.
Topics & Concepts
Fermi Gamma-ray Space TelescopePhysicsReciprocalHermitian matrixPoint (geometry)Enhanced Data Rates for GSM EvolutionTopology (electrical circuits)Arc (geometry)Theoretical physicsQuantum mechanicsGeometryComputer scienceMathematicsCombinatoricsArtificial intelligencePhilosophyLinguisticsQuantum Mechanics and Non-Hermitian PhysicsTopological Materials and PhenomenaMechanical and Optical Resonators