Observation of Light-Induced Dipole-Dipole Forces in Ultracold Atomic Gases
arXiv:2202.00562 · doi:10.1103/PhysRevX.12.031018
Abstract
We investigate an attractive force caused by light induced dipole-dipole interactions in freely expanding ultracold 87Rb atoms. This collective, light-triggered effect results in a self-confining potential with interesting features: it exhibits nonlocal properties, is attractive for both red and blue-detuned light fields and induces a remarkably strong force that depends on the gradient of the atomic density. The experimental data are discussed in the framework of a theoretical model based on a local-field approach for the light scattered by the atomic cloud.
arXiv comment13 pages, 9 figures
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