Anharmonic quantum contribution to vibrational dephasing.
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.
Barik
Debashis
D
Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India.
Ray
Deb Shankar
DS