Vortex spin in a superfluid

Emil Génetay Johansen; Tapio Simula

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arXiv · 2305.16016

Vortex spin in a superfluid

Emil Génetay Johansen·Tapio Simula

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Abstract

General relativity predicts that the curvature of spacetime induces spin rotations on a parallel transported particle. We deploy Unruh's analogue gravity picture and consider a quantised vortex embedded in a two-dimensional superfluid Bose--Einstein condensate. We show that such a vortex behaves dynamically like a charged particle with a spin in a gravitational field. The existence of a vortex spin in a superfluid complements Onsager's prediction of the quantisation of circulation, and is suggestive of potential quantum technology applications of rotating superfluids.

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cond-mat.quant-gas gr-qc quant-ph

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Emil Génetay Johansen, Tapio Simula. 2023-05-25. Vortex spin in a superfluid. https://arxiv.org/abs/2305.16016

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