We demonstrate that final states of ultracold molecules by scattering with atoms can be selectively produced using dynamic magnetic fields of multiple frequencies. We develop a multifrequency Floquet coupled channel method to study the channel selection by dynamic magnetic field control, which can be interpreted by a generalized quantum Zeno effect for the selected scattering channels. In particular, we use an atom-molecule spin-flip scattering to show that the transition to certain final states of the molecules in the inelastic scattering can be suppressed by engineered coupling between the Floquet states.

中文翻译：

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动态磁场中超冷原子分子散射的通道选择

我们证明，可以使用多频率的动态磁场选择性地产生通过原子散射的超冷分子的最终状态。我们开发了一种多频 Floquet 耦合通道方法来研究动态磁场控制的通道选择，这可以通过所选散射通道的广义量子芝诺效应来解释。特别是，我们使用原子-分子自旋翻转散射来表明非弹性散射中分子向某些最终状态的转变可以通过 Floquet 状态之间的工程耦合来抑制。