钠玻色-爱因斯坦凝聚体的全光产生和光缔合探测
All-optical generation and photoassociative probing of sodium Bose-Einstein condensates
摘要：
本文介绍了一种蒸发制备钠玻色-爱因斯坦凝聚体（BEC）的全光学技术。我们使用由1060 nm附近的光形成的交叉偶极阱，以及一个简单的强度斜坡来强制蒸发。此外，我们引入光缔合作为陷阱加载过程的诊断，并表明它可以用来检测玻色-爱因斯坦凝聚的发生。最后，我们展示了直接生产的多个陷阱，使用这种技术的冷凝物，并通过定位陷阱，以及一些控制的旋量状态的BEC实现。
英文摘要：
We demonsatrate an all optical technique to evaporatively produce sodium Bose-Einstein condensates (BEC). We use a crossed-dipole trap formed from light near 1060 nm, and a simple ramp of the intensity to force evaporation. In addition, we introduce photoassociation as diagnostic of the trap loading process, and show that it can be used to detect the onset of Bose-Einstein condensation. Finally, we demonstrate the straightforward production of multiple traps with condensates using this technique, and that some control over the spinor state of the BEC is achieved by positioning the trap as well.
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