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Synthetic Partial Waves in Ultracold Atomic Collisions

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Science  20 Jan 2012:
Vol. 335, Issue 6066, pp. 314-317
DOI: 10.1126/science.1212652

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Extending the Range

Ultracold atomic gases are attractive for quantum simulations of condensed-matter systems because of their tunability; however, while the strength of interactions can be tuned, their range is effectively zero. Williams et al. (p. 314, published online 8 December) used a pair of Raman lasers to modify the interaction between two colliding Bose-Einstein condensates to include beyond–s-wave (d- and g-wave) contributions. This technique should enable the simulation of more complicated solid-state systems, including those supporting exotic superfluidity.

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