用直流电场和磁场控制RbCs的交流斯塔克效应
Controlling the ac Stark effect of RbCs with dc electric and magnetic fields
摘要：
我们研究了静电场和磁场对超冷玻色子$^{87}$ Rb $^{133}$ Cs分子微波跃迁的差分交流斯塔克位移的影响，波长为$λ= 1064~\mathrm{nm}$。在这个波长附近，我们观察到意想不到的双光子跃迁，可能会导致陷阱损失。利用第一转动跃迁的微波光谱测量了外磁场和电场中的交流斯塔克效应。我们量化的各向同性和各向异性的分子极化率在这个波长的部分。我们证明了适度的电场可以使核自旋与转动角动量解耦，从而大大简化了交流斯塔克效应。我们利用这种简化来控制交流斯塔克位移使用的偏振角的捕获激光。
英文摘要：
We investigate the effects of static electric and magnetic fields on the differential ac Stark shifts for microwave transitions in ultracold bosonic $^{87}$Rb$^{133}$Cs molecules, for light of wavelength $λ= 1064~\mathrm{nm}$. Near this wavelength we observe unexpected two-photon transitions that may cause trap loss. We measure the ac Stark effect in external magnetic and electric fields, using microwave spectroscopy of the first rotational transition. We quantify the isotropic and anisotropic parts of the molecular polarizability at this wavelength. We demonstrate that a modest electric field can decouple the nuclear spins from the rotational angular momentum, greatly simplifying the ac Stark effect. We use this simplification to control the ac Stark shift using the polarization angle of the trapping laser.
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