title: Anharmonic quantum contribution to vibrational dephasing.
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.
authors.affiliation: Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India.
authors.forename: Debashis
authors.initials: D
authors.lastname: Barik
authors.forename: Deb Shankar
authors.initials: DS
authors.lastname: Ray