Journal
PHYSICAL REVIEW A
Volume 105, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.105.023505
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Funding
- CNRS
- European Training Network ColOpt (European Union Horizon 2020 programme under the Marie Sklodowska-Curie action) [721465]
- Global Engagement Fund of the University of Strathclyde
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We investigate the interaction between two mechanisms for magnetic self-organization in a cloud of cold rubidium atoms. The transitions between different phases, induced by either a weak transverse magnetic field or laser intensity, are observed and characterized. The experimental observations are successfully compared to numerical simulations based on a spin-1 model.
We investigate the interplay between two mechanisms for magnetic self-organization in a cloud of cold rubidium atoms subjected to a retroreflected laser beam. The transition between two different phases, one linked to a spontaneous spatial modulation of the Am = 2 ground-state coherence and the other to that of the magnetic orientation (spin), can be induced by tuning either a weak transverse magnetic field or the laser intensity. We observe both first- and second-order transitions depending on the presence of the magnetic field. The experimental observations are successfully compared to extended numerical simulations based on a spin-1 model.
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