Projects per year
Abstract
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 Δm=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.
Original language | English |
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Article number | 023505 |
Number of pages | 10 |
Journal | Physical Review A |
Volume | 105 |
Issue number | 2 |
DOIs | |
Publication status | Published - 7 Feb 2022 |
Keywords
- light-matter interaction
- effects of atomic coherence on light propagation
- nonlinear optics
- atomic gases
- magnetic moment
- atom & ion cooling
Fingerprint
Dive into the research topics of 'Ground-state coherence versus orientation: competing mechanisms for light-induced magnetic self-organization in cold atoms'. Together they form a unique fingerprint.Projects
- 1 Finished
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Collective effects and optomechanics in ultra-cold matter (ColOpt) (H2020 MCSA ETN)
Ackemann, T., Griffin, P., Oppo, G., Robb, G. & Yao, A.
European Commission - Horizon 2020
1/01/17 → 31/12/20
Project: Research
Activities
- 1 Oral presentation
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Dipolar and quadrupolar spontaneous magnetic ordering in an atomic spin system mediated by light
Thorsten Ackemann (Speaker), Josh Walker (Contributor), Gordon Robb (Contributor), Gian-Luca Oppo (Contributor), G. Labeyrie (Contributor) & R. Kaiser (Contributor)
28 Mar 2022 → 29 Mar 2022Activity: Talk or presentation types › Oral presentation