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cond-mat2002★ 1 cited
Implementing the Keldysh formalism into the ab initio Gaussian Embedded Cluster Method for the calculation of quantum transport
E. Louis, J. A. Verges, J. J. Palacios +2
We discuss the key steps that have to be followed to calculate quantum transport out of equilibrium by means of the {\it ab initio} Gaussian Embedded Cluster Method recently develo…
cond-mat1994
The wavefunction renormalization constant for the one- and two- band Hubbard hamiltonians in two dimensions
E. Louis, G. Chiappe, J. Galan +2
The wavefunction renormalization in the Hubbard model is studied, by using well tested mean field tecniques. The 'orthogonality catastrophe' is shown to exist, even in 2D, for dopi…
cond-mat1994
Hartree Fock and RPA studies of the Hubbard model
F. Guinea, E. Louis, J. A. Verges
The applicability of the Hartree-Fock and random phase approximations to models of strongly correlated electrons is discussed. The 2D Hubbard model is analyzed. An antiferromagneti…