Abstract
We report an improved test of the weak equivalence principle by using a simultaneous dual-species atom interferometer. We propose and implement a four-wave double-diffraction Raman transition scheme for the interferometer, and demonstrate its ability in suppressing common-mode phase noise of Raman lasers after their frequencies and intensity ratios are optimized. The statistical uncertainty of the experimental data for Eötvös parameter is at 3200 s. With various systematic errors corrected, the final value is . The major uncertainty is attributed to the Coriolis effect.
- Received 1 March 2015
DOI:https://doi.org/10.1103/PhysRevLett.115.013004
© 2015 American Physical Society