Nuclear spin self compensation system for moving MEG sensing with optical pumped atomic spin co-magnetometer

• URL: http://arxiv.org/abs/2204.10481v1
• Date: Fri, 22 Apr 2022 03:41:10 GMT
• Title: Nuclear spin self compensation system for moving MEG sensing with optical pumped atomic spin co-magnetometer
• Authors: Yao Chen, Yintao Ma, Mingzhi Yu, Yanbin Wang, Ning Zhang, Libo Zhao, and Zhuangde Jiang
• Abstract summary: We describe a new potential candidate: an optically pumped atomic co-magnetometer for moving MEGs recording. In the OPACM, hyper-polarized nuclear spins could produce a magnetic field which will shield the background low frequency magnetic field noise. We show that the OPACM owns a clear suppression of low frequency magnetic field under 1Hz and response to magnetic field's frequencies around the band of the MEGs.
• Score: 11.44633792903414
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Recording the moving MEGs of a person in which a person's head could move freely as we record the brain's magnetic field is a hot topic in recent years. Traditionally, atomic magnetometers are utilized for moving MEGs recording and a large compensation coil system is utilized for background magnetic field compensation. Here we described a new potential candidate: an optically pumped atomic co-magnetometer(OPACM) for moving MEGs recording. In the OPACM, hyper-polarized nuclear spins could produce a magnetic field which will shield the background fluctuation low frequency magnetic field noise while the the fast changing MEGs signal could be recorded. The nuclear spins look like an automatic magnetic field shields and dynamically compensate the fluctuated background magnetic field noise. In this article, the magnetic field compensation is studied theoretically and we find that the compensation is closely related to several parameters such as the electron spin magnetic field, the nuclear spin magnetic field and the holding magnetic field. Based on the model, the magnetic field compensation could be optimized. We also experimentally studied the magnetic field compensation and the responses of the OPACM to different frequencies of magnetic field are measured. We show that the OPACM owns a clear suppression of low frequency magnetic field under 1Hz and response to magnetic field's frequencies around the band of the MEGs. Magnetic field sensitivity of $3fT/Hz^{1/2}$ has been achieved. Finally, we do a simulation for the OPACM as it is utilized for moving MEGs recording. For comparison, the traditional compensation system for moving MEGs recording is based on a coil which is around 2m in dimension while our compensation system is only 2mm in dimension. Moreover, our compensation system could work in situ and will not affect each other.

Related papers

• Dual axis atomic magnetometer and gyroscope enabled by nuclear spin perturbation [0.0]
  We present a new method for co-magnetometry between a single noble gas and alkali species. While similar to well-known devices using self-compensation, our scheme introduces magnetic pulses that controllably perturb the noble gas. These applied pulses allow our scheme to measure, rather than just suppress, the effect of magnetic noise.
  arXiv  Detail & Related papers  (2024-11-08T04:22:15Z)
• Magnetic Field Detection Using a Two-Qubit System Under Noisy Heisenberg Interaction [2.7855886538423182]
  We propose a method to design a magnetic field detector using a noisy two-qubit system. We find that the magnetic field does not significantly influence the decoherence process, but it introduces a distinct oscillation in the return probability over time. These results point towards the feasibility of realizing a practical quantum-based magnetic field detector.
  arXiv  Detail & Related papers  (2024-10-30T06:13:15Z)
• Imaging magnetism evolution of magnetite to megabar pressure range with quantum sensors in diamond anvil cell [57.91882523720623]
  We develop an in-situ magnetic detection technique at megabar pressures with high sensitivity and sub-microscale spatial resolution. We observe the macroscopic magnetic transition of Fe3O4 in the megabar pressure range from strong ferromagnetism (alpha-Fe3O4) to weak ferromagnetism (beta-Fe3O4) and finally to non-magnetism (gamma-Fe3O4) The presented method can potentially investigate the spin-orbital coupling and magnetism-superconductivity competition in magnetic systems.
  arXiv  Detail & Related papers  (2023-06-13T15:19:22Z)
• Magnetic Field Independent SERF Magnetometer [0.0]
  We show that atoms with nuclear spin $I=1/2$ can operate in the Spin-Exchange Relaxation Free regime but for any magnitude of the magnetic field. We analyze the performance of a dual-specie potassium and atomic hydrogen magnetometer, and project a fundamental sensitivity of about $10.
  arXiv  Detail & Related papers  (2022-09-27T00:36:02Z)
• DC Quantum Magnetometry Below the Ramsey Limit [68.8204255655161]
  We demonstrate quantum sensing of dc magnetic fields that exceeds the sensitivity of conventional $Tast$-limited dc magnetometry by more than an order of magnitude. We used nitrogen-vacancy centers in a diamond rotating at periods comparable to the spin coherence time, and characterize the dependence of magnetic sensitivity on measurement time and rotation speed.
  arXiv  Detail & Related papers  (2022-03-27T07:32:53Z)
• Surpassing the Energy Resolution Limit with ferromagnetic torque sensors [55.41644538483948]
  We evaluate the optimal magnetic field resolution taking into account the thermomechanical noise and the mechanical detection noise at the standard quantum limit. We find that the Energy Resolution Limit (ERL), pointed out in recent literature, can be surpassed by many orders of magnitude.
  arXiv  Detail & Related papers  (2021-04-29T15:44:12Z)
• Single-quadrature quantum magnetometry in cavity electromagnonics [0.0]
  Scheme of ultra-sensitive magnetometer in the cavity quantum electromagnonics is proposed. Intracavity microwave mode coupled to a magnonic mode via magnetic dipole interaction is proposed. The estimated theoretical sensitivity of the proposed magnetic amplifier-sensor is approximately in the order of $10-18T/sqrtHz$ which is competitive compared to the current state-of-the-art magnetometers.
  arXiv  Detail & Related papers  (2020-11-11T21:23:19Z)
• Ferromagnetic Gyroscopes for Tests of Fundamental Physics [49.853792068336034]
  A ferromagnetic gyroscope (FG) is a ferromagnet whose angular momentum is dominated by electron spin polarization and that will precess under the action of an external torque. We model and analyze FG dynamics and sensitivity, focusing on practical schemes for experimental realization.
  arXiv  Detail & Related papers  (2020-10-17T07:13:50Z)
• Nuclear Spin Assisted Magnetic Field Angle Sensing [0.0]
  Quantum sensing exploits the strong sensitivity of quantum systems to measure small external signals. The nitrogen-vacancy center in diamond is one of the most promising platforms for real-world quantum sensing applications.
  arXiv  Detail & Related papers  (2020-10-08T18:24:16Z)
• Direct control of high magnetic fields for cold atom experiments based on NV centers [50.591267188664666]
  In cold atomic gases the interactions between the atoms are directly controllable through external magnetic fields. Here, we overcome the limitations of such an indirect control through a direct feedback scheme. We achieve a control of better than 1 ppm after 20 minutes of integration time, ensuring high long-term stability for experiments.
  arXiv  Detail & Related papers  (2020-03-18T09:03:25Z)
• Optimal coupling of HoW$_{10}$ molecular magnets to superconducting circuits near spin clock transitions [85.83811987257297]
  We study the coupling of pure and magnetically diluted crystals of HoW$_10$ magnetic clusters to microwave superconducting coplanar waveguides. Results show that engineering spin-clock states of molecular systems offers a promising strategy to combine sizeable spin-photon interactions with a sufficient isolation from unwanted magnetic noise sources.
  arXiv  Detail & Related papers  (2019-11-18T11:03:06Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.