Kavli Affiliate: Long Zhang
| First 5 Authors: Jinting Li, Xi Chen, Danfang Zhang, Wenzhang Wang, Yang Zhou
| Summary:
High-precision gyroscopes in space are essential for fundamental physics
research and navigation. Due to its potential high precision, the cold atom
gyroscope is expected to be the next generation of gyroscopes in space. Here,
we report the first realization of a cold atom gyroscope, which was
demonstrated by the atom interferometer installed in the China Space Station
(CSS) as a payload. By compensating for CSS’s high dynamic rotation rate using
a built-in piezoelectric mirror, spatial interference fringes in the
interferometer are successfully obtained. Then, the optimized ratio of the
Raman laser’s angles is derived, the coefficients of the piezoelectric mirror
are self-calibrated in orbit, and various systemic effects are corrected. We
achieve a rotation measurement resolution of 50*10^-6 rad/s for a single shot
and 17*10^-6 rad/s for an average number of 32. The measured rotation is
(-1142+/-29)*10^-6 rad/s and is compatible with that recorded by the classical
gyroscope of the CSS. This study paves the way for developing high-precision
cold atom gyroscopes in space.
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