Jóźwiak H, Wcisło P
Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University in Toruń, Grudziądzka 5, 87-100, Toruń, Poland.
Sci Rep. 2022 Aug 25;12(1):14529. doi: 10.1038/s41598-022-18159-y.
Molecular hydrogen, among other simple calculable atomic and molecular systems, possesses a huge advantage of having a set of ultralong living rovibrational states that make it well suited for studying fundamental physics. Further experimental progress will require trapping cold H samples. However, due to the large energy of the first electronic excitation, the conventional approach to finding a magic wavelength does not work for H. We find a rovibrational transition for which the AC Stark shift is largely compensated by the interplay between the isotropic and anisotropic components of polarizability. The residual AC Stark shift can be completely eliminated by tuning the trapping laser to a specific "magic wavelength" at which the weak quadrupole polarizability cancels the residual dipole polarizability.
在其他简单的可计算原子和分子系统中，分子氢具有一组超长寿命的振转态，这使其非常适合研究基础物理学，具有巨大优势。进一步的实验进展将需要捕获冷氢样本。然而，由于第一电子激发的能量很大，传统的寻找魔术波长的方法对氢不起作用。我们发现了一个振转跃迁，对于该跃迁，交流斯塔克位移在很大程度上被极化率的各向同性和各向异性分量之间的相互作用所补偿。通过将捕获激光调谐到特定的“魔术波长”，残余的交流斯塔克位移可以完全消除，在该波长下，弱四极极化率抵消了残余偶极极化率。
