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.

Subject Categories:

  • Physical Chemistry
  • Numerical Mathematics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE