60 citations · 237 across the 12 of their papers we have counts for
7 papers · 1 filter
Examining Convergence of Cluster Perturbation Theory and Cluster Coupled Cluster for J1-J2 Heisenberg Spin Lattices
Jeffrey Keyes, Carlos Jimenez-Hoyos
In previous work, it was shown that using the cluster mean field(cMF) wavefunction as the zeroth order wavefunction for perturbation theory and coupled cluster produces a reasonabl…
Five years of density matrix embedding theory
Sebastian Wouters, Carlos A. Jiménez-Hoyos, Garnet K. -L. Chan
Density matrix embedding theory (DMET) describes finite fragments in the presence of a surrounding environment. In contrast to most embedding methods, DMET explicitly allows for qu…
A cluster-based mean-field and perturbative description of strongly correlated fermion systems. Application to the 1D and 2D Hubbard model
Carlos A. Jiménez-Hoyos, Gustavo E. Scuseria
We introduce a mean-field and perturbative approach, based on clusters, to describe the ground state of fermionic strongly-correlated systems. In cluster mean-field, the ground sta…
Variational description of the ground state of the repulsive two-dimensional Hubbard model in terms of nonorthogonal symmetry-projected Slater determinants
R. Rodríguez-Guzmán, Carlos A. Jiménez-Hoyos, Gustavo E. Scuseria
The few determinant (FED) methodology, introduced in our previous works for 1D lattices, is here adapted for the repulsive two-dimensional Hubbard model at half-filling and with fi…
Multi-reference symmetry-projected variational approximation for the ground state of the doped one-dimensional Hubbard model
R. Rodríguez-Guzmán, Carlos A. Jiménez-Hoyos, Gustavo E. Scuseria
A multi-reference configuration mixing scheme is used to describe the ground state, characterized by well defined spin and space group symmetry quantum numbers as well as doping fr…
Symmetry-projected Wave Functions in Quantum Monte Carlo Calculations
Hao Shi, Carlos A. Jiménez-Hoyos, R. Rodríguez-Guzmán +2
We consider symmetry-projected Hartree--Fock trial wave functions in constrained-path Monte Carlo (CPMC) calculations. Previous CPMC calculations have mostly employed Hartree--Fock…
Multi-reference symmetry-projected variational approaches for ground and excited states of the one-dimensional Hubbard model
R. Rodríguez-Guzmán, Carlos A. Jiménez-Hoyos, R. Schutski +1
We present a multi-reference configuration mixing scheme for describing ground and excited states, with well defined spin and space group symmetry quantum numbers, of the one-dimen…