一氧化碳振动波包动力学中的电偶极翻转
Flipping electric dipole in the vibrational wave packet dynamics of carbon monoxide
AI总结：
受里德堡原子-离子束缚态偶极翻转机制启发，研究发现一氧化碳$^1Σ^+_g$电子基态振动波包动力学中存在偶极翻转，且可通过相干态参数调控其动力学特征。
摘要：
近期，研究人员利用高分辨率离子显微镜观测到了里德堡原子-离子束缚态（Nature 605, 453 (2022)），并对相应的振动态动力学进行了光谱分析。这种原子-离子键由包含分子偶极翻转的免交叉过程形成。受该束缚机制发现的启发，本文研究基态双原子分子是否也会出现类似行为。具体而言，我们探究了一氧化碳（CO）的$^1Σ^+_g$电子基态内的振动波包动力学，该态的偶极矩函数在其平衡位置附近存在一个零点。通过相干态的时间演化，我们证实确实会出现偶极翻转，且其动力学可在一定程度上被调控。通过改变相干态参数，我们探索了振动激发谱的不同区域，进而调控相关可观测量快速振荡运动的时间尺度、它们的衰减与复兴，以及向不规则动力学区域的转变。
英文摘要：
Recently Rydberg atom-ion bound states have been observed using a high resolution ion microscope (Nature 605, 453 (2022)) and the corresponding vibrational dynamics has been spectroscopically analyzed. The atom-ion bond is created by an avoided crossing, which involves a flipping molecular dipole. Motivated by the discovery of this binding mechanism we address here the question whether a similar behavior can also occur for ground state diatomic molecules. Specifically, we investigate the vibrational wave packet dynamics within the $^1Σ^+_g$ electronic ground-state of carbon monoxide (CO), which shows a zero crossing of its dipole moment function close to its equilibrium. Via time-evolution of coherent states we demonstrate that indeed a flipping dipole is obtained and its dynamics can be controlled to some extent. Varying the coherent state parameter we explore different regions of the vibrational excitation spectrum thereby tuning the time scales of the rapid oscillatory motion of the relevant observables, their decay and revivals as well as the transition to a regime of irregular dynamics.
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