Time-averaged adiabatic ring potential for ultracold atoms
Time-averaged adiabatic ring potential for ultracold atoms
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DOI：
10.1103/physreva.83.043408
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发表时间：
2011-02
影响因子：
2.9
通讯作者：
B. Sherlock;M. Gildemeister;E. Owen;E. Nugent;C. Foot
中科院分区：
文献类型：
--
作者：
B. Sherlock;M. Gildemeister;E. Owen;E. Nugent;C. Foot
我们报道了一个多用途的超冷原子环阱的实验实现。环的几何形状是由时间平均绝热势产生的振荡偏置磁场的应用程序，射频修饰的四极阱。环中玻色-爱因斯坦凝聚体的寿命超过11 s，环半径从50 μ m到262 μ m连续变化。提出了一种从常规的时间平均轨道势阱加载环的有效方法，并提出了一种将角动量引入系统的旋转方案。该环提供了一个机会，研究超流体性质的冷凝物在一个多连接的几何形状，也有应用的物质波干涉。
We report the experimental realization of a versatile ring trap for ultracold atoms. The ring geometry is created by the time-averaged adiabatic potential resulting from the application of an oscillating magnetic bias field to a rf-dressed quadrupole trap. Lifetimes for a Bose-Einstein condensate in the ring exceed 11s and the ring radius was continuously varied from 50 {mu}m to 262 {mu}m. An efficient method of loading the ring from a conventional time-averaged orbiting potential trap is presented together with a rotation scheme which introduces angular momentum into the system. The ring presents an opportunity to study the superfluid properties of a condensate in a multiply connected geometry and also has applications for matter-wave interferometry.