48 citations · 140 across the 6 of their papers we have counts for
6 papers
Symmetry-projected variational approach for ground and excited states of the two-dimensional Hubbard model
R. Rodríguez-Guzmán, K. W. Schmid, Carlos A. Jiménez-Hoyos +1
We present a symmetry-projected configuration mixing scheme to describe ground and excited states, with well defined quantum numbers, of the two-dimensional Hubbard model with near…
Spherical Hartree-Fock calculations with linear momentum projection before the variation.Part II: Spectral functions and spectroscopic factors
R. R. Rodríguez--Guzmán, K. W. Schmid
The hole--spectral functions and from these the spectroscopic factors have been calculated in an Galilei--invariant way for the ground state wave functions resulting from spherical…
Spherical Hartree-Fock calculations with linear momentum projection before the variation.Part I: Energies, form factors, charge densities and mathematical sum rules
R. R. Rodríguez--Guzmán, K. W. Schmid
Spherical Hartree--Fock calculations with projection onto zero total linear momentum before the variation are performed for the nuclei 4He, 12C, 16O, 28Si, 32S and 40Ca using a den…
A symmetry-projected variational approach to the 1-dimensional Hubbard-model
K. W. Schmid, T. Dahm, J. Margueron +1
We apply a variational method devised for the nuclear many--body problem to the 1-dimensional Hubbard--model with nearest neighbor hopping and periodic boundary conditions. The tes…
sd-Shell Study with a Multi-Configuration Mixing Approach designed for Large Scale Nuclear Structure Calculations
E. Bender, K. W. Schmid, Amand Faessler
A systematic numerical investigation of a recently developed nuclear structure approach is presented which diagonalizes the Hamiltonian in the space of the symmetry-projected Hartr…
A Multi-Configuration Mixing Approach with Symmetry-Projected Complex Hartree-Fock-Bogoliubov Determinants
E. Bender, K. W. Schmid, Amand~Faessler
A multi-configuration mixing approach built on essentially complex, symmetry-projected Hartree-Fock-Bogoliubov (HFB) mean fields is introduced. The mean fields are obtained by vari…