Parquet approximation for the 4x4 Hubbard cluster (2009)
Yang, S. X., Fotso, H., Liu, J., Maier, T. A., Tomko, K., D'Azevedo, E. F., ...
We present a numerical solution of the parquet approximation (PA), a conserving diagrammatic approach which is self-consistent at both the single-particle and the two-particle levels. The fully...