What Does PEDM Stand For?

PEDM stands for Perturbation Expansion Of The Density Matrix

PEDM, or Perturbation Expansion Of The Density Matrix, is a mathematical framework used in quantum mechanics and statistical physics to analyze the behavior of quantum systems under small perturbations. By expanding the density matrix in a series, PEDM facilitates the calculation of physical properties and responses of quantum systems in diverse fields, including condensed matter physics and quantum chemistry. This method provides insights into how systems evolve when subjected to external influences, enabling a better understanding of both equilibrium and non-equilibrium phenomena.