极性重原子分子在恒定拍频相位下的光学受激慢化
Optical stimulated slowing of polar heavy-atom molecules with a constant beat phase
摘要：
极性重原子分子被认为是基础物理精确测量和检验的理想对象。一个慢得多的分子束，以增加相互作用的时间，应导致更灵敏的测量。本文从理论上证明了在相干光学双色力作用下重原子分子受激纵向慢化的可能性。以YbF分子为例，说明了在适当的条件下，用相位补偿方法对重分子进行短距离快速减速是可行的。在激光辐照度为107.2 W/cm $^2$的情况下，前向速度为120 m/s的YbF分子束可以在3.5 cm的距离内减速到10 m/s以下。我们也给出了一个简单的方法来估计BCF对其他一些重分子的性能，这有助于对受激慢化实验的可行性进行快速评估。我们提出的慢化方法可能是一种很有前途的方法，可以突破传统减速方案中的空间限制或有限的分子捕获效率，从而为显着提高精确测量灵敏度提供可能性。
英文摘要：
Polar heavy-atom molecules have been well recognized as promising candidates for precision measurements and tests of fundamental physics. A much slower molecular beam to increase the interaction time should lead to a more sensitive measurement. Here we theoretically demonstrate the possibility of the stimulated longitudinal slowing of heavy-atom molecules by the coherent optical bichromatic force with a constant beat phase. Taking the YbF meolecule as an example, we show that a rapid and short-distance deceleration of heavy molecules by a phase-compensation method is feasible with moderate conditions. A molecular beam of YbF with a forward velocity of 120 m/s can be decelerated below 10 m/s within a distance of 3.5 cm and with a laser irradiance for each traveling wave of 107.2 W/cm$^2$. We also give a simple approach to estimate the performance of the BCF on some other heavy molecules, which is helpful for making a rapid evaluation on the feasibility of the stimulated slowing experiment. Our proposed slowing method could be a promising approach to break through the space constraint or the limited capture efficiency of molecules loadable into a MOT in traditional deceleration schemes, opening the possibility for a significant improvement of the precision measurement sensitivity.
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