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arXiv physics/0604233physics.atom-ph
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铯原子基态的斯塔克效应:电张量极化率和时钟跃迁频率的漂移

Stark effect of the cesium ground state: electric tensor polarizability and shift of the clock transition frequency

S. Ulzega, A. Hofer, P. Moroshkin, A. Weis

摘要:

本文对铯原子基态超精细结构中的斯塔克效应进行了理论分析。我们使用了三阶微扰理论,包括对角和非对角超精细相互作用,并确定了在早期治疗中没有考虑的条款。数值计算使用的扰动水平n=18产生新的值的张量极化率$α_2(6S_{1/2})$和斯塔克移动的时钟跃迁频率在铯。的极化率是在很好的协议与实验值,从而消除了40岁的差异。时钟偏移值与最近的测量结果非常一致,但与用于校正主频率标准黑体偏移的普遍接受的值相矛盾。

英文摘要:

We present a theoretical analysis of the Stark effect in the hyperfine structure of the cesium ground-state. We have used third order perturbation theory, including diagonal and off-diagonal hyperfine interactions, and have identified terms which were not considered in earlier treatments. A numerical evaluation using perturbing levels up to n=18 yields new values for the tensor polarizability $α_2(6S_{1/2})$ and for the Stark shift of the clock transition frequency in cesium. The polarizabilities are in good agreement with experimental values, thereby removing a 40-year-old discrepancy. The clock shift value is in excellent agreement with a recent measurement, but in contradiction with the commonly accepted value used to correct the black-body shift of primary frequency standards.

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