Tunable Interactions in Quantum Gases of Lithium

该奖项为继续研究冷锂原子中玻色-爱因斯坦(Be)凝聚的研究项目提供资金。将研究Li-6和Li-7以及这两种同位素的混合物。Li-7中的Be凝聚特别有趣，因为其中一个自旋态具有吸引人的相互作用，一些工作将集中在对这种凝聚态的继续研究上，特别是应用磁场产生费什巴赫共振的影响。费什巴赫共振也将被用来调节一对Li-6自旋态的相互作用，目标是产生S波-库珀配对相变。最后，在Li-7中，双光子与分子基态的光缔合将被用来改变相互作用强度，目的是产生和捕获双原子锂的超冷分子，然后可能发生凝聚。

This award provides funding for the continuation of a research project in the study of Bose-Einstein (BE) condensation in cold lithium atoms. Both Li-6 and Li-7 and mixtures of these two isotopes will be studied. BE condensation in Li-7 is particularly interesting because one of the spin states has attractive interactions, and some of the work will focus on the continuation of studies of this condensate, particularly the effect of the application of a magnetic field to produce Feshbach resonances. A Feshbach resonance will also be used to tune the interaction in a pair of Li-6 spin states, with the goal of producing an s-wave Cooper pairing phase transition. Finally, two-photon photoassociation to a molecular ground state in Li-7 will be used to change the interaction strength with the goal of producing and trapping ultracold molecules of diatomic lithium that may then undergo BE condensation.