A New Design Method for a Triaxial Magnetic Field Gradient Compensation System Based on Ferromagnetic Boundary

Wu, Zhihong; Pang, Haoying; Wang, Zhuo; Fan, Wenfeng; Liu, Feng; Liu, Ye; Quan, Wei

doi:10.1109/tie.2024.3352166

Cited by 11 publications

(1 citation statement)

References 34 publications

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“…This portion of atomic spin also exhibits spatial distribution with different modes, which requires evaluating the weight by the overlap between the light mode and the spin diffusion modes [36]. Magnetic field generated by coils is not perfectly uniform, which results in a spatially-related manipulation of atomic spins and spatially-related spin relaxation [44][45][46]. This nuanced understanding of spin dynamics could be pivotal in refining the operational parameters of quantum sensors, thereby enhancing their sensitivity and reliability.…”

Section: Introductionmentioning

confidence: 99%

Mode analysis of spin field of thermal atomic ensembles

Wang,

Xia,

Quan

et al. 2024

Quantum Sci. Technol.

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The spin dynamics in a thermal atomic vapor cell have been investigated thoroughly over the past decades and have proven successful in quantum metrology and memory owing to their long coherent time and manipulation convenience. The existing mean field analysis of spin dynamics among the whole cell is sometimes inaccurate due to the non-uniform of the ensemble and spatial coupling of multi-physical fields interacting with the ensembles. Here we perform mode analysis onto the quasi-continuous spin field including atomic thermal motion to derive Bloch mode equations and obtain corresponding analytical solutions in diffusion regime. We show that the widely used mean field dynamics of thermal gas is a particular case in our solution corresponding to the uniform spatial mode. This mode analysis approach offers a precise method for analyzing the dynamics of the spin ensemble in greater details from a field perspective, enabling the effective determination of spatially non-uniform multi-physical field coupling with the spin ensembles, which cannot be accurately analyzed by the mean field method. Furthermore, this work paves a way to address noises and relaxation mechanisms associated with non-uniform fields and interatomic interactions, which are limiting the further improvement of ultrasensitive spin-based sensors.

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Section: Introductionmentioning

confidence: 99%

Mode analysis of spin field of thermal atomic ensembles

Wang,

Xia,

Quan

et al. 2024

Quantum Sci. Technol.

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In Situ Measurement of the Non‐Orthogonal Angles of Magnetic Field Coils Based on Single‐Beam Magnetic Resonance

Liu,

Dong,

et al. 2024

Adv Quantum Tech

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This work proposes a novel method for in situ measurement of the non‐orthogonal angles of magnetic field coils based on single‐beam magnetic resonance. The orthogonality of magnetic field coils is crucial for ensuring the accuracy of atomic magnetometers. The theoretical principles are derived to establish a measurement method for the non‐orthogonal angles. The proposed method requires only one single beam of light to perform in situ measurements of non‐orthogonal angles in the YZ and XZ directions. The experimental results demonstrate that the angle between the Y and Z coils is 89.3001 ± 0.0045°, a value that remains stable despite variations in experimental parameters such as temperature and light power, thereby confirming the robustness of the method. Additionally, the measured gyromagnetic ratio is 6.9963 ± 0.0005 Hz nT−1, which closely matches the theoretical value of 6.9958 Hz nT−1, further validating the method's accuracy. The proposed method provides a more straightforward approach and has significant potential for widespread application across various atomic magnetometers, especially in miniaturized configurations. Furthermore, this method may be extended to the field of atomic gyroscopes.

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Design and implementation of a high-performance miniaturized multi-layer magnetic shielding spherical shell with minimal pores based on target magnetic field

Li,

et al. 2024

Defence Technology

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A New Design Method for a Triaxial Magnetic Field Gradient Compensation System Based on Ferromagnetic Boundary

Cited by 11 publications

References 34 publications

Mode analysis of spin field of thermal atomic ensembles

Mode analysis of spin field of thermal atomic ensembles

In Situ Measurement of the Non‐Orthogonal Angles of Magnetic Field Coils Based on Single‐Beam Magnetic Resonance

Design and implementation of a high-performance miniaturized multi-layer magnetic shielding spherical shell with minimal pores based on target magnetic field

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