线性势阱中可扩展的玻色-爱因斯坦凝聚体Sagnac干涉仪
A scalable Bose-Einstein condensate Sagnac interferometer in a linear trap
摘要:
我们利用玻色-爱因斯坦凝聚体演示了谐振磁波导中的二维原子干涉仪。这样的干涉仪可以利用Sagnac效应测量旋转。与自由空间干涉仪相比,原则上可以实现更大的相互作用时间和封闭区域,因为原子不是自由降落。在这个实现中,我们诱导原子沿一个方向振荡的陷阱中心的位移。然后,我们使用非共振光学驻波沿正交方向分裂和重组原子。我们附上0.1平方毫米的最大有效面积,在初始速度和干涉仪的相干时间的波动的限制。我们认为,这种安排是可扩展的,通过增加相干时间,然后使重复循环包围更大的区域。
英文摘要:
We demonstrate a two-dimensional atom interferometer in a harmonic magnetic waveguide using a Bose-Einstein condensate. Such an interferometer could measure rotation using the Sagnac effect. Compared to free space interferometers, larger interactions times and enclosed areas can in principle be achieved, since the atoms are not in free fall. In this implementation, we induce the atoms to oscillate along one direction by displacing the trap center. We then split and recombine the atoms along an orthogonal direction, using an off-resonant optical standing wave. We enclose a maximum effective area of 0.1 square mm, limited by fluctuations in the initial velocity and the coherence time of the interferometer. We argue that this arrangement is scalable to enclose larger areas by increasing the coherence time and then making repeated loops.
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