Projects per year
Abstract
Cold atom setups are now commonly employed in simulations of condensed matter phenomena. We present a novel approach to induce strong magnetic interactions between atoms on a self-organized lattice using diffraction of light. Diffractive propagation of structured light fields leads to an exchange between phase and amplitude modulated planes which can be used to couple atomic degrees of freedom via optical pumping nonlinearities. In the experiment a cold cloud of Rb atoms placed near a retro-reflecting mirror is driven by a detuned pump laser. We demonstrate spontaneous magnetic ordering in the Zeeman sublevels of the atomic ground state: anti-ferromagnetic structures on a square lattice and ferrimagnetic structures on a hexagonal lattice in zero and a weak longitudinal magnetic field, respectively. The ordered state is destroyed by a transverse magnetic field via coherent dynamics. A connection to the transverse (quantum) Ising model is drawn.
Original language | English |
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Article number | 33 |
Number of pages | 9 |
Journal | Communications Physics |
Volume | 1 |
DOIs | |
Publication status | Published - 10 Jul 2018 |
Keywords
- cold atoms
- magnetic interactions
- optical lattices
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Projects
- 3 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
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Cooperative effects and nonlinear optics in dense ensembles of cold atoms
Ackemann, T., Arnold, A., Firth, W., Oppo, G. & Robb, G.
1/06/11 → 31/05/14
Project: Research
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SELF-ORGANIZATION OF COLD MATTER DUE TO OPTO-MECHANICAL COUPLING
Ackemann, T., Arnold, A. & Robb, G.
1/01/11 → 30/04/15
Project: Research
Datasets
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Data for: "Spontaneous light-mediated magnetism in cold atoms"
Ackemann, T. (Creator), University of Strathclyde, 12 Jul 2018
DOI: 10.15129/386278bf-dd5f-4dd6-8808-2a2728beed93
Dataset