Vibronic coupling effects usually manifest themselves in molecules and crystals rather than in unbound atoms. We theoretically demonstrate the existence of vibronic states in a moving two-level atom exposed to a strong electromagnetic (EM) wave. In this case, the Rabi oscillations of the electron density give rise to periodic displacements of the atomic nucleus with the Rabi frequency. The periodic displacements mix the Stark split electron levels and lead to the establishment of a channel for energy transfer in the atomic system. Such a channel paves the way for fast control of the kinetic energy of a free atom with the use of the parameters of an EM wave. Thus, the system kinetic energy can be decreased or increased if the detuning between the laser pulse frequency and the optical transition is positive or negative, respectively. For actual values of the detuning, the pulse duration should be an order of magnitude longer than the lifetime of the excited atomic level in order t...

中文翻译：

---

快速拉比振荡引起的振动耦合以控制自由原子中的动能

振动耦合效应通常表现在分子和晶体中，而不是未结合的原子中。我们从理论上证明了暴露于强电磁（EM）波的移动两级原子中振动子状态的存在。在这种情况下，电子密度的拉比振荡引起原子核的拉比频率的周期性位移。周期性位移混合了Stark分裂电子能级，并导致建立了原子系统中能量转移的通道。这样的通道为利用EM波的参数快速控制自由原子的动能铺平了道路。因此，如果激光脉冲频率和光学跃迁之间的失谐分别为正或负，则系统动能可以减小或增加。