Anharmonic quantum contribution to vibrational dephasing
arXiv:physics/0407023 · doi:10.1063/1.1766007
Abstract
Based on a quantum Langevin equation and its corresponding Hamiltonian within a c-number formalism we calculate the vibrational dephasing rate of a cubic oscillator. It is shown that leading order quantum correction due to anharmonicity of the potential makes a significant contribution to the rate and the frequency shift. We compare our theoretical estimates with those obtained from experiments for small diatomics $N_2$, $O_2$ and $CO$.
21 pages, 1 figure and 1 table