Markov Noise in Atomic Spin Gyroscopes: Analysis and Suppression Based on Allan Deviation

Pei, Hongyu; Fan, Wenfeng; Du, Pengcheng; Zhang, Kai; Yuan, Linlin; Quan, Wei

doi:10.1109/tim.2023.3246473

Cited by 6 publications

(6 citation statements)

References 41 publications

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“…Parameter K-3 He [ 20,32] Cs-129 Xe [ 38,39] K-Rb-21 Ne [ 16,40] 𝛾 while 129 Xe atoms have the lowest ℂ| B z . The phenomenon described above arises from the interaction between electron spin and the K-Rb- 21 Ne spin-coupling ensemble.…”

Section: Resultsmentioning

confidence: 99%

“…A K-Rb- 21 Ne co-magnetometer (ASG) was developed to implement spin-decoupling and precise measurement of electron spin Fermi contact field, which bear resemblance to earlier work. [16] The apparatus was schematically illustrated in Figure 2a. At the heart of the oven lied a 5-mm-radius GE180 gas cell that contains a drop of K-Rb mixed alkali metal provided electron spin, 700 Torr 21 Ne with 70% abundance provided nuclear spin, and 20 Torr N 2 as quenching gas.…”

Section: Methodsmentioning

confidence: 99%

“…[ 15 ] By taking advantage of the lower precession frequency and longer relaxation time of nuclear spin compared to electron spin, angular velocity measurements can be possible. The gyro drift of atomic spin gyroscopes (ASGs) based on this principle has been achieved to

5.76 \times {10}^{-3\circ}

/h@100s [ 16 ] with the K‐Rb‐ 21 Ne coupling ensemble, showing potential as new generation high‐precision gyroscopes. An Rb‐ 129/131 Xe Nuclear magnetic resonance gyroscopes (NMRG) with lower magnetic shielding requirements have achieved 0.01°/h@1000s gyro drift within 10 3 cm volume.…”

Section: Introductionmentioning

confidence: 99%

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Spin‐Decoupling and In‐Situ Nuclear Magnetometer with Hyperpolarized Nuclear Spin

et al. 2023

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This paper investigates the dynamical properties of the spin‐coupling ensemble, with a focus on the spin‐decoupling phenomenon. The nuclear spin in such systems is significantly impacted by the electron spin when the main magnetic field approaches the Fermi contact field of nuclear spin, leading to measurement inaccuracies. A comprehensive dynamics model of the electron‐nuclear spin coupling ensemble has been established and analyzed. It proposes that the primary magnetic field augmenting effectively disentangles the precession frequency of the two spin‐coupling species, thereby yielding a spin‐decoupled state. Such a state allows nuclear spin serves as a high sensitive element for magnetic field measurements, while electron spin serves as a probe to acquire the precession of nuclear spin. With proposed method, a magnetic field resolution of 0.75 nT in a 12000 nT environment is achieved, indicating potential for magnetic field detection in geomagnetic environments. It further demonstrates measurements of electron spin Fermi contact interaction and polarization based on spin‐decoupling and in situ nuclear spin precession, results indicate measurement errors close to 1%. These results demonstrate the effectiveness of our approach in improving the accuracy and sensitivity of magnetic field measurements in spin‐coupled systems such as co‐magnetometers, nuclear magnetic resonance gyroscopes, and nuclear magnetometers.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

5.76 \times {10}^{-3\circ}

Section: Introductionmentioning

confidence: 99%

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Spin‐Decoupling and In‐Situ Nuclear Magnetometer with Hyperpolarized Nuclear Spin

et al. 2023

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“…After introducing N sets of composite magnetic field noise B x,y (t) into Model Equation (3), the corresponding dynamic evolution over a duration of 1000 ms is depicted in Figure 1. The black line represents the mean value calculated via Equation (13). The blue area is enclosed by 𝜇 ± 3𝜎, computed using Equations ( 13) and ( 14), while the red area is enclosed by 𝜇 ± 5𝜎.…”

Section: Model Verificationmentioning

confidence: 99%

“…[10,11] External magnetic field interference alters the original spin state of atoms and modifies certain inherent atomic ensembles parameters, thereby compromising measurement sensitivity and stability. [12,13] The majority of external magnetic interferences are effectively mitigated by a magnetic shielding system, with the remaining influence actively compensated for by triaxial magnetic field coils. [10,14] Despite these measures, stochastic magnetic field noise persistently impacts atomic ensembles due to the absence of active suppression methods.…”

Section: Introductionmentioning

confidence: 99%

Effects of Stochastic Magnetic Noise on the SERF Co‐Magnetometer

Li,

Wang,

Fan

et al. 2024

Adv Quantum Tech

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Stochastic magnetic field noise has a non‐negligible negative impact on the performance of quantum precision measurement instruments such as spin‐exchange relaxation‐free (SERF) co‐magnetometer in terms of sensitivity and stability. Conventional magnetic field error analysis and suppression methods are not applicable to stochastic magnetic field noise. In this paper, a stochastic model of the SERF co‐magnetometer is proposed to analyze the mechanism of stochastic magnetic field noise. The mean and covariance propagation model of the SERF co‐magnetometer is given based on the stochasticity model and statistical principles. The analysis of simulation experiments reveals that reducing the longitudinal electron spin polarization can somewhat reduce the standard deviation of the system output caused by stochastic magnetic field noise. And the atomic ensembles are most resistant to stochastic magnetic field noise when the electron spin polarization strongly couples with the nuclear spin polarization. Finally, the experiments verified the above conclusions. In conclusion, this paper provides theoretical and experimental support for analyzing and suppressing the effect of stochastic magnetic field noise on the SERF co‐magnetometer, which is of great significance for improving the sensitivity and stability of the measurement.

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