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arXiv 2303.10352gr-qchep-exphysics.atom-ph
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在地球尺度范围内寻找自旋依赖的引力相互作用

Search for spin-dependent gravitational interactions at the Earth range

Shaobo Zhang, Zengli Ba, Denghui Ning, Nianfu Zhai, Zhengtian Lu, Dong Sheng

AI总结:

本研究开发了原子气体共磁力仪,通过测量同位素自旋进动频率比检验引力与自旋耦合,在地球尺度下将中子自旋-引力耦合上限提升17倍,并约束了轴子等反常相互作用。

摘要:

在四种基本力中,根据广义相对论,只有引力不与粒子自旋耦合。我们通过在地面寻找中子自旋与地球引力之间的反常标量耦合来检验这一原理。我们开发了一种原子气体共磁力仪来测量$^{129}$Xe和$^{131}$Xe之间的核自旋进动频率比,并在传感器于地球引力场中翻转时,以10$^{-9}$的精度寻找该比值的变化。此次搜索的零结果设定了地面中子自旋与引力耦合能的上限为5.3$\ imes$10$^{-22}$~eV(95%置信水平),相比之前的限制提高了17倍。该结果还可用于约束其他几种反常相互作用。特别是,在地球半径尺度范围内,轴子介导的单极-偶极相互作用的耦合强度限制提高了17倍。

英文摘要:

Among the four fundamental forces, only gravity does not couple to particle spins according to the general theory of relativity. We test this principle by searching for an anomalous scalar coupling between the neutron spin and the Earth gravity on the ground. We develop an atomic gas comagnetometer to measure the ratio of nuclear spin-precession frequencies between $^{129}$Xe and $^{131}$Xe, and search for a change of this ratio to the precision of 10$^{-9}$ as the sensor is flipped in the Earth gravitational field. The null results of this search set an upper limit on the coupling energy between the neutron spin and the gravity on the ground at 5.3$\times$10$^{-22}$~eV (95\% confidence level), resulting in a 17-fold improvement over the previous limit. The results can also be used to constrain several other anomalous interactions. In particular, the limit on the coupling strength of axion-mediated monopole-dipole interactions at the range of the Earth radius is improved by a factor of 17.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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