Topological superfluid defects with discrete point group symmetries

Y. Xiao, M. O. Borgh, A. Blinova, T. Ollikainen, J. Ruostekoski and D. S. Hall ()
Additional contact information
Y. Xiao: Amherst College
M. O. Borgh: University of East Anglia
A. Blinova: Amherst College
T. Ollikainen: Amherst College
J. Ruostekoski: Lancaster University
D. S. Hall: Amherst College

Nature Communications, 2022, vol. 13, issue 1, 1-8

Abstract: Abstract Discrete symmetries are spatially ubiquitous but are often hidden in internal states of systems where they can have especially profound consequences. In this work we create and verify exotic magnetic phases of atomic spinor Bose–Einstein condensates that, despite their continuous character and intrinsic spatial isotropy, exhibit complex discrete polytope symmetries in their topological defects. Using carefully tailored spinor rotations and microwave transitions, we engineer singular line defects whose quantization conditions, exchange statistics, and dynamics are fundamentally determined by these underlying symmetries. We show how filling the vortex line singularities with atoms in a variety of different phases leads to core structures that possess magnetic interfaces with rich combinations of discrete and continuous symmetries. Such defects, with their non-commutative properties, could provide unconventional realizations of quantum information and interferometry.

Date: 2022
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DOI: 10.1038/s41467-022-32362-5

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