被囚禁多原子分子的黑体热化与振动寿命
Blackbody thermalization and vibrational lifetimes of trapped polyatomic molecules
AI总结：
本研究建立速率方程模型模拟光囚禁多原子分子与室温黑体辐射的热化过程，用以测定超冷CaOH分子低振动态寿命，计算值与实验吻合，并拓展计算了SrOH、YbOH等可激光冷却分子的振动态寿命。
摘要：
我们研究了受室温黑体辐射作用的光囚禁多原子分子的内部态动力学。利用考虑了电子基态振转能级间辐射衰变与黑体激发的速率方程，我们模拟了分子与环境热化的微观行为。作为该模型的一项应用，我们详细阐述了测定超冷CaOH分子低振动态的黑体寿命与辐射寿命的流程，相关数值已在先前工作[Hallas等人，arXiv:2208.13762]中报道。我们开展了从头算计算，发现计算结果与测量值吻合。我们还计算了包括SrOH和YbOH在内的其他几种可激光冷却分子的振动态寿命。
英文摘要：
We study the internal state dynamics of optically trapped polyatomic molecules subject to room temperature blackbody radiation. Using rate equations that account for radiative decay and blackbody excitation between rovibrational levels of the electronic ground state, we model the microscopic behavior of the molecules' thermalization with their environment. As an application of the model, we describe in detail the procedure used to determine the blackbody and radiative lifetimes of low-lying vibrational states in ultracold CaOH molecules, the values of which were reported in previous work [Hallas et al., arXiv:2208.13762]. Ab initio calculations are performed and are found to agree with the measured values. Vibrational state lifetimes for several other laser-coolable molecules, including SrOH and YbOH, are also calculated.
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