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Creffield, Charles E. ; Kornilovitch, P. E. ; Klepfish, E. G. ; Pike, E. R. ; Sarkar, Sarben | IOP Publishing Ltd. | 1997-05-05A Quantum Monte Carlo calculation of dynamical spin susceptibility in the half-filled 2D Hubbard model is presented for temperature T = 0.2t and an intermediate on-site repulsion U = 4t. Using the singular value decomposition technique we succee[...]texto impreso
Creffield, Charles E. ; Háusler, Wolfgang ; Jefferson, John H ; Sarkar, Sarben | American Physical Society | 1999-04-15The low-lying eigenstates of a system of two electrons confined within a two-dimensional quantum dot with a hard polygonal boundary are obtained by means of exact diagonalization. The transition from a weakly correlated charge distribution for s[...]texto impreso
Spectral weight function for the half-filled hubbard-model - a singular-value decomposition approach
Creffield, Charles E. ; Klepfish,, E.G. ; Pike, E. R. ; Sarkar, Sarben | American Physical Society | 1995-07-17The singular value decomposition technique is used to reconstruct the electronic spectral weight function for a half-filled Hubbard model with on-site repulsion U = 4t from quantum Monte Carlo data. A two-band structure for the single-particle e[...]texto impreso
Creffield, Charles E. ; Klepfish, E. G. ; Pike, E. R. ; Sarkar, Sarben | American Physical Society | 1995-07-17The singular value decomposition technique is used to reconstruct the electronic spectral weight function for a half-filled Hubbard model with on-site repulsion U = 4t from quantum Monte Carlo data. A two-band structure for the single-particle e[...]
