Electric-field-dependent dynamic polarizability and state-insensitive conditions for optical trapping of diatomic polar molecules
Electric-field-dependent dynamic polarizability and state-insensitive conditions for optical trapping of diatomic polar molecules
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双原子极性分子光捕获的电场相关动态极化率和状态不敏感条件
DOI：
10.1103/physreva.82.063421
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发表时间：
2010
影响因子：
2.9
通讯作者：
D. DeMille
中科院分区：
文献类型：
--
作者：
S. Kotochigova;D. DeMille
选择超冷原子或分子的状态不敏感或“魔术”捕获条件，其中内部状态对经历相同的捕获势，为精确测量和量子计算方案带来了实质性的好处。在这种条件下工作可以确保显著降低超冷样品中不可避免的不均匀性的有害影响。然而，这方面的限制仍然是未开发的超冷极性分子。在这里，我们提出的方法来控制交流斯塔克移动的超冷双原子极性分子的旋转状态，当受到两个陷阱激光和外部电场。我们发现，这两个领域的强度和相对取向的影响的捕获势。特别是，我们预测的“魔术电场强度”和“魔术角”，斯塔克位移是独立的直流外场的分子的某些旋转状态。
Selection of state-insensitive or 'magic' trapping conditions with ultracold atoms or molecules, where pairs of internal states experience identical trapping potentials, brings substantial benefits to precision measurements and quantum computing schemes. Working at such conditions could ensure that the detrimental effects of inevitable inhomogeneities across an ultracold sample are significantly reduced. However, this aspect of confinement remains unexplored for ultracold polar molecules. Here, we present means to control the ac Stark shift of rotational states of ultracold diatomic polar molecules, when subjected to both trapping laser light and an external electric field. We show that both the strength and relative orientation of the two fields influence the trapping potential. In particular, we predict 'magic electric field strengths' and a 'magic angle', where the Stark shift is independent of the dc external field for certain rotational states of the molecule.