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Effects related to the temperature of atoms in an atom interferometry gravimeter based on ultra-cold atoms

作者: 来源: 发布时间:2021年12月27日 14:51 点击次数:[]

Effects related to the temperature of atoms in an atom interferometry gravimeter based on ultra-cold atoms

Heng Zhang, Xudong Ren, Wenhua Yan, Yuan Cheng, Hang Zhou, Zhi Gao*, Qin Luo†, Minkang Zhou, Zhongkun Hu

Abstract:The temperature of atoms, coupled to several effects, plays an important role in high precision atom interferometry gravimeters. In this work, we present an ultra-cold 87Rb atom interferometry gravimeter, in which the atom source is produced by evaporative cooling in an all optical dipole trap to investigate the effects related to atom temperature. A condensate containing 4 × 104 atoms can be prepared within 3.2 s through an all-optical dipole trap composed of two reservoirs and a dimple. The fringe contrast of our atom interferometry gravimeter reaches up to 76(4)% due to the advantage of ultra-cold atom source even at a free evolution time of T=80 ms. A resolution of 6 μGal (1 μGal=1×10−8 m/s2) after 3000 s integration time with a sampling rate of 0.25 Hz is achieved in this atom gravimeter. The relationship between the fringe contrast and the atom temperature in the atom gravimeter is studied; in addition, the wavefront aberration effect in the atom gravimeter is also investigated by varying the temperature of atoms.

期刊名:Optics Express

/卷:29

页码:30007

发表时间:1 Sep 2021

DOI:10.1364/OE.433968