Self-driven Hybrid Atomic Spin Oscillator

• URL: http://arxiv.org/abs/2301.12121v2
• Date: Fri, 9 Jun 2023 09:16:55 GMT
• Title: Self-driven Hybrid Atomic Spin Oscillator
• Authors: Erwei Li, Qianjin Ma, Guobin Liu, Peter Yun and Shougang Zhang
• Abstract summary: The raw signal of Rb spin oscillation is amplified, phase-shifted and sent back to drive the Xe spins coherently. The effective coherence time is infinitely prolonged beyond the intrinsic coherence time of Xe spins. The spin oscillator can be easily implanted into other hybrid spin systems and enhance the detection sensitivity of alkali metal-noble gas comagnetometers.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: A self-driven hybrid atomic spin oscillator is demonstrated in theory and experiment with a vapor Rb-Xe dual-spin system. The raw signal of Rb spin oscillation is amplified, phase-shifted and sent back to drive the Xe spins coherently. By fine tuning the driving field strength and phase, a self-sustaining spin oscillation signal with zero frequency shift is obtained. The effective coherence time is infinitely prolonged beyond the intrinsic coherence time of Xe spins, forming a hybrid atomic spin oscillator. Spectral analysis indicates that a frequency resolution of 13.1 nHz is achieved, enhancing the detection sensitivity for magnetic field. Allan deviation analysis shows that the spin oscillator can operate in continuous wave mode like a spin maser. The prototype spin oscillator can be easily implanted into other hybrid spin systems and enhance the detection sensitivity of alkali metal-noble gas comagnetometers.

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