Cellular Dynamical Mean Field Theory of the Holstein Polaron Problem

by Jean-Marc Robin

We show how to set up a Cellular Dynamical Mean Field Theory for the Holstein's polaron problem using the exact solution of a cluster of n sites embedded in a Weiss's field. We show that a restricted basis, that allows excitations of phonons only for n sites at a time, reproduces exactly the equations of the n-site Dynamical Mean Field Theory, and enables to check the proposed decoupling scheme of the Green's functions via Exact Numerical Diagonalizations...

• Format: Paperback
• Language: English
• ISBN: 1445222809
• ISBN13: 9781445222806
• Release Date: November 2009
• Publisher: Lulu.com
• Length: 52 Pages
• Weight: 0.20 lbs.
• Dimensions: 0.1" x 6.0" x 9.0"