Computer-aided cluster expansion: An efficient algebraic approach for open quantum many-particle systems

Published: 29-10-2016| Version 1 | DOI: 10.17632/fjwxr28j3d.1
Alexander Foerster,
H. A. M. Leymann,
J. Wiersig


We introduce an equation of motion approach that allows for an approximate evaluation of the time evolution of a quantum system, where the algebraic work to derive the equations of motion is done by the computer. The introduced procedures offer a variety of different types of approximations applicable for finite systems with strong coupling as well as for arbitrary large systems where augmented mean-field theories like the cluster expansion can be applied.