Based on a quantum Langevin equation and its corresponding Hamiltonian withina c-number formalism we calculate the vibrational dephasing rate of a cubicoscillator. It is shown that leading order quantum correction due toanharmonicity of the potential makes a significant contribution to the rate andthe frequency shift. We compare our theoretical estimates with those obtainedfrom experiments for small diatomics $N_2$, $O_2$ and $CO$.
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机译：基于一个量子兰格文方程及其相应的哈密顿带c数形式主义，我们计算了立方振荡器的振动相移速率。结果表明，由于电势的非谐性，导致前导量子校正对速率和频移起重要作用。我们将理论估计值与从小硅藻$ N_2 $，$ O_2 $和$ CO $实验获得的估计值进行比较。
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