Quantum Statistical Theory of Vibrational Dynamics in a Laser-Driven Admolecule-Surface System

摘要

A quantum statistical theory for a laser-driven anharmonic oscillator coupled to a system of many degrees of freedom by means of energy and phase dissipative mechanisms is presented. The theory is applied to the description of vibrational dynamics in an admolecule-surface system, which are associated with desorption/dissociation processes. It is found that phase relaxation plays an important role in assisting the laser driving force to overcome the anharmonicity and/or detuning 'bottleneck', It it also known that a shorter duration of the pulse rule is more efficient for depositing photon energy into the admolecule-system.