Density dependence of the dephasing and energy relaxation times by computer simulations

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Abstract
The energy relaxation time (T1) and dephasing time (T2) of a system of molecules interacting by spherically symmetric intermolecular and vibrational potentials have been evaluated by the molecular dynamics method. The computational ease introduced by the spherical symmetry of the potentials allows an extensive study of the density variations of T1 and T2 from the gas phase to the highly compressed liquid and solid, as well as of the influence of a long range component in the vibrational potential on the relaxation times. The general trends which proceed from this study are compared with recent theoretical approaches and experimental observations.