@ Author: Kai Song, ks838_at_cam.ac.uk @ Notes: In this pdf file, I gave the detailed derivations of the famous Hierarchical Equations Of Motion(HEOM), which describe the dissipative propagation of the reduced density matrix.
@ Notes: 1 Tanimura and Kubo, 1989 2 Just google Yijing Yan, or Qiang Shi, or Ishizaki. These guys have contributed a lot to HEOM.