Quantum Dynamics with Spatiotemporal Control of Interactions in a Stable Bose-Einstein Condensate
Quantum Dynamics with Spatiotemporal Control of Interactions in a Stable Bose-Einstein Condensate
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DOI：
10.1103/physrevlett.115.155301
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发表时间：
2015-10-05
影响因子：
8.6
通讯作者：
Chin, Cheng
中科院分区：
文献类型：
--
作者：
Clark, Logan W.;Ha, Li-Chung;Chin, Cheng
量子气体中原子相互作用的光学控制是冷原子研究长期追求的目标。先前的实验受到量子气体的快速衰减和陷阱势的寄生变形的阻碍。我们开发并实现了一种通用的菲什巴赫共振光学控制方案，该方案可产生较长的量子气体寿命和可忽略不计的寄生偶极子力。我们表明，相互作用的快速和局部控制导致了新体制中有趣的量子动力学，突出显示了范德华分子的形成和玻色凝聚物的局部坍缩。
Optical control of atomic interactions in quantum gases is a long-sought goal of cold atom research. Previous experiments have been hindered by rapid decay of the quantum gas and parasitic deformation of the trap potential. We develop and implement a generic scheme for optical control of Feshbach resonances which yields long quantum gas lifetimes and a negligible parasitic dipole force. We show that fast and local control of interactions leads to intriguing quantum dynamics in new regimes, highlighted by the formation of van der Waals molecules and localized collapse of a Bose condensate.