摘要: A method for the analysis of computer simulations of ultrafast dynamicalprocesses in many-body systems is presented, based on a joint time-frequency Wigner-Ville distribution calculated from the evolving particle velocities. This ... 展开 A method for the analysis of computer simulations of ultrafast dynamicalprocesses in many-body systems is presented, based on a joint time-frequency Wigner-Ville distribution calculated from the evolving particle velocities. This quantity has the interpretation of a time and frequency-dependent effective temperature, and the evolution of the distribution allows dynamical information about energy flow between modes and relaxation mechanisms of many-body systems to be obtained. This approach is illustrated for the example of vibrational relaxation of an I2 impurity in an argon cluster. Molecular dynamics, energy transfer, time series analysis, Wigner-Ville distribution. 收起