不同自旋取向原子自由降落普适性的检验
Test of the universality of free fall with atoms in different spin orientations
摘要：
通过比较$m_F=+1$和$m_F=-1$中$^{87}$ Rb原子的重力加速度，我们对自由降落（UFF）的普适性进行了测试。利用Mach-Zehnder型原子干涉仪测量了这两个磁子能级上原子的自由降落加速度，得到了EPDMATHABMP与$\rm{\ddot{o}}$ s的比值为${η_S} =(0.2\pm1.2)\times 10^{-7}$ .这也给出了时空挠率可能梯度场的上限为$1.1\times 10^{-21}$ GeV/m。利用$m_F=\pm 1$中原子的干涉仪对磁场的不均匀性具有很高的灵敏度，提出了一种双微分测量方法来减轻不均匀性的影响。此外，通过调制磁场的验证实验，验证了在我们的测试中的不均匀性的影响的缓解。
英文摘要：
We report a test of the universality of free fall (UFF) by comparing the gravity acceleration of the $^{87}$Rb atoms in $m_F=+1$ versus that in $m_F=-1$, where the corresponding spin orientations are opposite. A Mach-Zehnder-type atom interferometer is exploited to sequentially measure the free fall acceleration of the atoms in these two magnetic sublevels, and the resultant E$\rm{\ddot{o}}$tv$\rm{\ddot{o}}$s ratio is ${η_S} =(0.2\pm1.2)\times 10^{-7}$. This also gives an upper limit of $1.1\times 10^{-21}$ GeV/m for possible gradient field of the spacetime torsion. The interferometer using atoms in $m_F=\pm 1$ is highly sensitive to the magnetic field inhomogeneity, and a double differential measurement method is developed to alleviate the inhomogeneity influence. Moreover, a proof experiment by modulating the magnetic field is performed, which validates the alleviation of the inhomogeneity influence in our test.
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。
