Abstract
We propose a cellular version of dynamical mean field theory which gives a natural generalization of its original single-site construction and is formulated in different sets of variables. We incorporate a possible nonorthogonality of the tight-binding basis set and prove that the resulting equations lead to manifestly causal self-energies.
- Received 23 October 2000
DOI:https://doi.org/10.1103/PhysRevLett.87.186401
©2001 American Physical Society