Nonstationary Time Series Analysis of Many-Body Dynamics

Abstract

A method for the analysis of computer simulations of ultrafast dynamical processes 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 I(2) impurity in an argon cluster.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
May 01, 1992
Accession Number
ADA251766

Entities

People

  • Craig C. Martens

Organizations

  • University of California, Irvine

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Chemical Kinetics
  • Chemical Reactions
  • Chemistry
  • Computer Simulations
  • Computers
  • Dynamics
  • Energy
  • Energy Transfer
  • Frequency
  • Impurities
  • Kinetic Energy
  • Molecular Dynamics
  • Particles
  • Simulations
  • Statistical Mechanics
  • Time Series Analysis
  • Vibrational Relaxation

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Quantum Chemistry
  • Statistical inference.