Demonstration of an ultrahigh-sensitivity atom-interferometry absolute gravimeter

By Zhongkun Hu, Bu-Liang Sun, Xiao-chun Duan, Minkang Zhou, Lele Chen, S. Zhan, Qiao-Zhen Zhang, Jun Luo. 2013

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Stability comparison of two absolute gravimeters: optical versus atomic interferometers (2014, methodology): “As an example, the fountain configuration used in [17] allows to increase T up to 300 ms, to be compared with the 80 ms we use in the CAG.”
Quantum test of the Universality of Free Fall using rubidium and potassium (2020, background): “nested within the rubidium detection sequence. The leading order phase shift of such an interferometer due to an acceleration1 a i in the direction of beam splitting reads [34,55,56] ˚ = ke;iaiT 2 : (3) Applying a phase-continuous frequency ramp inot only maintains the Raman resonance condition unde”