质子长程自旋-引力耦合和偶极耦合的约束
Constraints on long-range spin-gravity and monopole-dipole couplings of the proton
摘要：
本文报道了寻找地球质量与铷原子核自旋之间长程偶极耦合的结果。该实验同时测量的自旋进动频率的重叠合奏的$^{85}$ Rb和$^{87}$ Rb原子包含在一个抽空，抗弛豫涂层蒸汽细胞。Rb同位素的原子核结构使得实验对质子的自旋相关相互作用特别敏感。在地球的领域的质子的引力能的自旋相关的组成部分被发现是小于$3 \times 10^{-18}~{\rm eV}$，改善实验室的限制，远距离偶极子相互作用超过三个数量级。
英文摘要：
Results of a search for a long-range monopole-dipole coupling between the mass of the Earth and rubidium (Rb) nuclear spins are reported. The experiment simultaneously measures the spin precession frequencies of overlapping ensembles of $^{85}$Rb and $^{87}$Rb atoms contained within an evacuated, antirelaxation-coated vapor cell. The nuclear structure of the Rb isotopes makes the experiment particularly sensitive to spin-dependent interactions of the proton. The spin-dependent component of the gravitational energy of the proton in the Earth's field is found to be smaller than $3 \times 10^{-18}~{\rm eV}$, improving laboratory constraints on long-range monopole-dipole interactions by over three orders of magnitude.
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