Accession Number:
AD1048265
Title:
Weyl Exceptional Rings in a Three-Dimensional Dissipative Cold Atomic Gas (Author's Manuscript)
Descriptive Note:
Journal Article - Open Access
Corporate Author:
University of Michigan Ann Arbor United States
Personal Author(s):
Report Date:
2017-01-27
Pagination or Media Count:
6.0
Abstract:
Three-dimensional topological Weyl semimetals can generally support a zero dimensional Weyl point characterized by a quantized Chern number or a one-dimensional Weyl nodal ring or line characterized by a quantized Berry phase in the momentum space. Here, in a dissipative system with particle gain and loss, we discover a new type of topological ring, dubbed Weyl exceptional ring consisting of exceptional points at which two eigenstates coalesce. Such a Weyl exceptional ring is characterized by both a quantized Chern number and a quantized Berry phase, which are defined via the Riemann surface. We propose an experimental scheme to realize and measure the Weyl exceptional ring in a dissipative cold atomic gas trapped in an optical lattice.
Descriptors:
Subject Categories:
- Physical Chemistry
- Numerical Mathematics