Affiliation:
1. University of Science and Technology of China
2. Hefei National Laboratory
3. Rice University
4. King's College London
Abstract
Artificial monopoles have been engineered in various systems, yet there has been no systematic study of the singular vector potentials associated with the monopole field. We show that the Dirac string, the line singularity of the vector potential, can be engineered, manipulated, and made manifest in a spinor atomic condensate. We elucidate the connection among spin, orbital degrees of freedom, and the artificial gauge, and show that there exists a mapping between the vortex filament and the Dirac string. We also devise a proposal where preparing initial spin states with relevant symmetries can result in different vortex patterns, revealing an underlying correspondence between the internal spin states and the spherical vortex structures. Such a mapping also leads to a new way of constructing spherical Landau levels, and monopole harmonics. Our observation provides insights into the behavior of quantum matter possessing internal symmetries in curved spaces.
Published by the American Physical Society
2024
Funder
National Natural Science Foundation of China
U.S. Department of Energy
Leverhulme Trust
National Science Foundation
Welch Foundation
Publisher
American Physical Society (APS)