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A one-to-two dimensional mapping using a partial fast Fourier transform
Stellan Ostlund
It will be shown how to map a simple one-dimensional tight binding model with a cosine potential in one dimension exactly to a two dimensional tight binding model with periodic bou…
Discretized Thermal Green's Functions
Mats Granath, Andro Sabashvili, Hugo U. R. Strand +1
We present a spectral weight conserving formalism for Fermionic thermal Green's functions that are discretized in imaginary time and thus periodic in imaginary ("Matsubara") freque…
The Dynamical Mean Field Theory phase space extension and critical properties of the finite temperature Mott transition
Hugo U. R. Strand, Andro Sabashvili, Mats Granath +2
We consider the finite temperature metal-insulator transition in the half filled paramagnetic Hubbard model on the infinite dimensional Bethe lattice. A new method for calculating…
Global symmetry of the Hubbard model on bipartite lattices
J. M. P. Carmelo, Stellan Ostlund, M. J. Sampaio
It is found that for on-site interaction the local gauge symmetry of the Hubbard model on a bipartite lattice with vanishing transfer inte…
The strong coupling Kondo lattice model as a Fermi gas
S. Ostlund
The strong coupling half-filled Kondo lattice model is an important example of a strongly interacting dense Fermi system for which conventional Fermi gas analysis has thus far fail…
Exact Transformation for Spin-Charge Separation of Spin-half Fermions without Constraints
Stellan Ostlund, Mats Granath
We demonstrate an exact local transformation which maps a purely Fermionic manybody system to a system of spinfull Bosons and spinless Fermions, demonstrating a possible path to a…