Physics

Tweaking atomic interactions optically

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Science  30 Oct 2015:
Vol. 350, Issue 6260, pp. 525-526
DOI: 10.1126/science.350.6260.525-d

Control over interactions in ultracold atomic gases makes them an appealing setting for quantum simulations. To exert this control, researchers typically tune external magnetic fields. However, varying interactions in time and space using this method remains tricky. Now, Clark et al. implement an optical scheme that enables such modulations. By carefully choosing the wavelength of the laser light they shone at a gas of Cs atoms, the researchers were able to modulate the interactions without the side effects that plagued earlier approaches. The work extends the potential of cold gases for quantum simulation.

Schematic view of the optical control of Feshbach resonances

PHOTO: CLARK ET AL., PHYSICAL REVIEW LETTERS 115, (9 OCTOBER 2015) © PHYSICS

Phys. Rev. Lett. 115, 155301 (2015).

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