Topological interfaces, phase transitions, and point-group symmetries – spinor Bose-Einstein condensates as topological-defect laboratories

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• Magnus Borgh, University of East Anglia
• Thursday 30 November 2023, 13:15-14:30
• Theory Library.

If you have a question about this talk, please contact Dr Hannah Price.

Atomic spinor Bose-Einstein condensates (BECs) have become prime testbed systems for the exploration of topologically complex defects and textures resembling those found in superfluid liquid He-3 and quantum field theories. They exist in a rich variety of magnetic phases with different order parameter symmetry support a wide range of different topological defects and textures, from quantised vortices to Skyrmions. Here I will show realisation of defects in a superfluid with internal point-group symmetries from our experimental collaboration with Amherst College. I will also show the theoretical construction and numerical simulation of defects and textures crossing the topological interface between co-existing phases. The richness of magnetic phases also allows for several quantum phase transitions of both first and second order. I will demonstrate a generalised Kibble-Zurek scaling at a first-order quantum-critical point.

This talk is part of the Theoretical Physics Seminars series.

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• Bham Talks
• Theoretical Physics Seminars
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