标题： 分子中振荡电场的筛选与增强 显示英文标题

标题： Screening and enhancement of oscillating electric field in molecules

摘要： 根据施夫定理，原子电子完全屏蔽了原子核对外部静态电场的影响。 然而，当电场是时变的时候，情况并非如此。 在原子中，电子轨道要么在电场频率偏离原子共振时屏蔽原子核，要么在电场频率接近原子跃迁能量时增强该电场。 在分子中，不仅电子状态，而且转动和振动状态也负责屏蔽振荡电场。 正如本文所示，由于分子的转动-振动状态，分子内部低频场的屏蔽作用远弱于原子中的情况。 我们系统地研究了不同频率范围内双原子分子内部振荡电场的屏蔽作用，即当电场频率处于转动-振动或电子跃迁频率量级时。 在共振情况下，我们证明由于转动-振动状态，微波频率电场可能增强多达六个数量级。 我们还推导了多原子分子中振荡电场的屏蔽和共振增强的一般公式。 这些结果的可能应用包括核电偶极矩的测量以及激光光刺激核反应。 显示英文摘要

摘要： According to the Schiff theorem, the atomic electrons completely screen the atomic nucleus from an external static electric field. However, this is not the case if the field is time-dependent. Electronic orbitals in atoms either shield the nucleus from an oscillating electric field when the frequency of the field is off the atomic resonances or enhance this field when its frequency approaches an atomic transition energy. In molecules, not only electronic, but also rotational and vibrational states are responsible for the screening of oscillating electric fields. As will be shown in this paper, the screening of a low-frequency field inside molecules is much weaker than it appears in atoms owing to the molecular ro-vibrational states. We systematically study the screening of oscillating electric fields inside diatomic molecules in different frequency regimes,i.e., when the field's frequency is either of order of ro-vibrational or electronic transition frequencies. In the resonance case, we demonstrate that the microwave-frequency electric field may be enhanced up to six orders in magnitude due to ro-vibrational states. We also derive the general formulae for the screening and resonance enhancement of oscillating electric field in polyatomic molecules. Possible applications of these results include nuclear electric dipole moment measurements and stimulation of nuclear reactions by laser light.