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Realization of a cold atom gyroscope in space
Jinting Li1,2, Xi Chen1, Danfang Zhang1,2
1State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Division of Precision Measurement Physics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China.
National Science Review
|April 2, 2025
Summary
The first cold atom gyroscope was successfully demonstrated on the China Space Station, achieving high-precision rotation measurements. This breakthrough paves the way for next-generation space navigation and fundamental physics research.
Area of Science:
- Atomic physics
- Space instrumentation
- Quantum sensing
Background:
- High-precision gyroscopes are crucial for space-based fundamental physics and navigation.
- Cold atom gyroscopes offer potential for next-generation precision.
Purpose of the Study:
- To report the first realization of a cold atom gyroscope as a payload on the China Space Station (CSS).
- To demonstrate the feasibility of using atom interferometry for precise rotation measurements in space.
Main Methods:
- An atom interferometer payload was installed on the CSS.
- A piezoelectric mirror compensated for the CSS's high dynamic rotation rate.
- Optimized Raman laser angles and in-orbit self-calibration of the mirror were employed.
- Systemic effects were corrected to improve measurement accuracy.
Main Results:
- Spatial interference fringes were successfully obtained in the atom interferometer.
- A rotation measurement resolution of 50 μrad/s (single shot) and 17 μrad/s (32 shots average) was achieved.
- Measured rotation of -1142 ± 29 μrad/s was compatible with the CSS's classical gyroscope.
Conclusions:
- The first space-based cold atom gyroscope has been successfully demonstrated.
- This technology shows significant potential for future high-precision space navigation and fundamental physics experiments.
- The results validate the feasibility of cold atom gyroscopes for space applications.
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