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Author ORCID Identifier
https://orcid.org/0000-0003-1874-4182
AccessType
Open Access Dissertation
Document Type
dissertation
Degree Name
Doctor of Philosophy (PhD)
Degree Program
Physics
Year Degree Awarded
2023
Month Degree Awarded
September
First Advisor
Prof. David S. Hall
Subject Categories
Atomic, Molecular and Optical Physics | Condensed Matter Physics
Abstract
Topological excitations are ubiquitous in nature, their charge being a naturally-quantized, conserved quantity that can exhibit particle-like behavior. Spinor Bose-Einstein condensates (BECs) are an exceptionally versatile system for the study and exploration of topological excitations. Between the spin-1 and spin-2 87Rb condensates there are seven possible broken-symmetry magnetic phases, with each one hosting unique opportunities for topological defects. We have created and observed several novel topological excitations in a spinor 87Rb BEC. In this dissertation I present and discuss three principal experimental findings: (1) The discovery of an Alice ring, or a half-quantum vortex ring, emerging from a monopole singularity in a nematic spin-1 BEC; (2) The first realization of a 't Hooft-Polyakov-type monopole in a nematic spin-2 BEC; and (3) The first realization of a knot in a nematic spin-2 BEC. This dissertation concludes with possible avenues for future research.
DOI
https://doi.org/10.7275/35973563
Recommended Citation
Blinova, Alina A., "Experiments with Monopoles, Rings and Knots in Spinor Bose-Einstein Condensates" (2023). Doctoral Dissertations. 2957.
https://doi.org/10.7275/35973563
https://scholarworks.umass.edu/dissertations_2/2957
Creative Commons License
This work is licensed under a Creative Commons Attribution-No Derivative Works 4.0 License.