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^{3}He-^{21}Ne Ramsey Comagnetometer with Sub-nHz Frequency Resolution.
Shaobo Zhang1, Jingyao Wang1, George Sun1
1Princeton University, Department of Physics, Princeton, New Jersey 08544, USA.
This study presents a new nuclear spin comagnetometer using Helium-3 and Neon-21 for precise measurements. The device achieves bias-free operation and high frequency sensitivity, advancing beyond the standard model physics research.
Area of Science:
- Atomic, Molecular, and Optical Physics
- Precision Measurement Science
- Fundamental Physics
Background:
- Nuclear spin comagnetometers provide high precision and stability for fundamental physics research.
- Applications include probing physics beyond the standard model and inertial rotation sensing.
Purpose of the Study:
- To describe a novel Helium-3-Neon-21 Ramsey comagnetometer.
- To enhance measurement precision and eliminate bias in nuclear spin measurements.
Main Methods:
- Utilized a $^{3}$He-$^{21}$Ne Ramsey comagnetometer with an in-situ $^{87}$Rb magnetometer.
- Implemented laser turn-off and microwave fields during free precession to suppress atomic back action.
- Controlled polarized sample geometry to eliminate scalar and dipolar interactions.
Main Results:
- Demonstrated a new $^{3}$He-$^{21}$Ne Ramsey comagnetometer.
- Achieved bias-free measurements by eliminating nuclear spin interactions.
- Obtained a frequency sensitivity of 0.6 nHz after six hours of integration.
Conclusions:
- The developed comagnetometer offers exceptional precision and long-term stability.
- This instrument is a powerful tool for probing spin-dependent physics beyond the standard model.
- The improvements enable bias-free measurements with enhanced frequency sensitivity.
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