Spontaneously sliding multipole spin density waves in cold atoms

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Labeyrie, G. and Walker, J.G.M. and Robb, G.R.M. and Kaiser, R. and Ackemann, T. (2024) Spontaneously sliding multipole spin density waves in cold atoms. Physical Review Letters, 132 (14). 143402. ISSN 1079-7114 (https://doi.org/10.1103/PhysRevLett.132.143402)

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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 retroreflecting 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.

ORCID iDs

Labeyrie, G., Walker, J.G.M. ORCID logoORCID: https://orcid.org/0000-0001-5966-0183, Robb, G.R.M. ORCID logoORCID: https://orcid.org/0000-0002-3004-5926, Kaiser, R. and Ackemann, T. ORCID logoORCID: https://orcid.org/0000-0003-2727-7395;
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