Slave-boson based configuration-interaction approach for the Hubbard model
arXiv:0801.4528 · doi:10.1103/PhysRevB.77.235109
Abstract
Based on the Kotliar-Ruckenstein slave-boson scheme we develop a configuration-interaction (CI) approach which is suitable to improve the energy of symmetry-broken saddle-point solutions. The theory is applied to spin-polaron states in the Hubbard model and compared with analogous results obtained within the Hartree-Fock approximation. In addition we show that within the infinite prescription of the Gutzwiller method a CI approach does not improve the variational result since in the thermodynamic limit matrix elements between different inhomogeneous states vanish due to an 'orthogonality catastrophe'.
8 pages, 2 figures
References in corpus (26)
- Band-structure trend in hole-doped cuprates and correlation with Tcmax
- Magnetic fluctuations from stripes in cuprates
- Metallic mean-field stripes, incommensurability and chemical potential in cuprates
- Effects of next-nearest-neighbor hopping on the electronic structure of cuprates
- Time-dependent Gutzwiller approximation for the Hubbard model
- Mott transition at large orbital degeneracy: dynamical mean-field theory
- Dynamical properties of the single--hole -- model on a 32--site square lattice
- Unrestricted slave-boson mean-field approximation for the two-dimensional Hubbard model
- Numerical approach to low-doping regime of the t-J model
- Striped phases in the two-dimensional Hubbard model with long-range Coulomb interaction
- Slave-boson approach to the metallic stripe phases with large unit cells
- Stability of metallic stripes in the extended one-band Hubbard model
- Spin and Charge Structure Factor of the 2-d Hubbard Model
- Angle resolved photoemission spectroscopy of Sr_2CuO_2Cl_2 - a revisit
- Vortex, skyrmion and elliptical domain wall textures in the two-dimensional Hubbard model
- Strongly renormalized quasi-two-dimensional electron gas in a heterostructure with correlation effects
- Slave bosons in radial gauge: a bridge between path integral and hamiltonian language
- Properties of Gutzwiller wave-functions for multi-band models
- Checkerboard and stripe inhomogeneities in cuprates
- A Configuration Interaction approach to hole pairing in the Two-Dimensional Hubbard Model
- Interface controlled electronic charge inhomogeneities in correlated heterostructures
- Hole motion in an arbitrary spin background: Beyond the minimal spin-polaron approximation
- On the correct continuum limit of the functional-integral representation for the four-slave-boson approach to the Hubbard model: Paramagnetic phase
- Static overscreening and nonlinear response in the Hubbard Model
- Single-hole properties in the - and strong-coupling models
- Partially filled stripes in the two dimensional Hubbard model: statics and dynamics