Blackbody thermalization and vibrational lifetimes of trapped polyatomic molecules
Blackbody thermalization and vibrational lifetimes of trapped polyatomic molecules
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DOI：
10.1103/physreva.107.062802
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发表时间：
2023-03
影响因子：
2.9
通讯作者：
N. Vilas;Christian Hallas;L. Anderegg;Paige Robichaud;Chaoqun Zhang;Sam Dawley;Lan Cheng;J. Doyle
中科院分区：
文献类型：
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作者：
N. Vilas;Christian Hallas;L. Anderegg;Paige Robichaud;Chaoqun Zhang;Sam Dawley;Lan Cheng;J. Doyle
我们研究了受室温黑体辐射影响的光学捕获多原子分子的内部状态动力学。使用解释电子基态振动能级之间的辐射衰变和黑体激发的速率方程，我们模拟了分子热化与其环境的微观行为。作为该模型的应用，我们详细描述了用于确定超冷 CaOH 分子中低振动态的黑体和辐射寿命的程序，其值已在之前的工作中报告过 [Hallas 等人，arXiv:2208.13762]。进行从头计算并发现与测量值一致。还计算了其他几种激光可冷却分子（包括 SrOH 和 YbOH）的振动态寿命。
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.