Spontaneously sliding multipole spin density waves in cold atoms

G. Labeyrie; J. G. M. Walker; G. R. M. Robb; R. Kaiser; T. Ackemann

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arXiv · 2310.17305

Spontaneously sliding multipole spin density waves in cold atoms

G. Labeyrie·J. G. M. Walker·G. R. M. Robb·R. Kaiser·T. Ackemann

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Abstract

We report on the observation of spontaneously drifting coupled spin and quadrupolar density waves in the ground state of laser driven Rubidium atoms. These laser-cooled atomic ensembles exhibit spontaneous magnetism via light mediated interactions when submitted to optical feedback by a retro-reflecting mirror. Drift direction and chirality of the waves arise from spontaneous symmetry breaking. The observations demonstrate a novel transport process in out-of-equilibrium magnetic systems.

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G. Labeyrie, J. G. M. Walker, G. R. M. Robb, R. Kaiser, T. Ackemann. 2023-10-26. Spontaneously sliding multipole spin density waves in cold atoms. https://arxiv.org/abs/2310.17305

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