Enhanced sensitivity to variation of me/mp in molecular spectra
Enhanced sensitivity to variation of me/mp in molecular spectra
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DOI：
10.1103/physrevlett.100.043202
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发表时间：
2008-02-01
影响因子：
8.6
通讯作者：
Tiesinga, E.
中科院分区：
文献类型：
--
作者：
DeMille, D.;Sainis, S.;Tiesinga, E.
我们提出了新的实验与高灵敏度的电子与质子的质量比μ相当于m（e）/m（p）的可能变化。我们考虑一对几乎简并的分子振动能级，每个能级对应一个不同的电子势。相对于μ的变化，这种水平之间的分裂的变化在绝对尺度上和相对于分裂都可以是大的。我们证明了存在这样的状态对Cs-2，其中实现与超冷分子的窄谱线，使系统有希望为未来的搜索μ的小变化。
We propose new experiments with high sensitivity to a possible variation of the electron-to-proton mass ratio mu equivalent to m(e)/m(p). We consider a nearly degenerate pair of molecular vibrational levels, each associated with a different electronic potential. With respect to a change in mu, the change in the splitting between such levels can be large both on an absolute scale and relative to the splitting. We demonstrate the existence of such pairs of states in Cs-2, where the narrow spectral lines achievable with ultracold molecules make the system promising for future searches for small variations in mu.