16 papers · 1 filter
Dynamical Functions of a 1D Correlated Quantum Liquid
J. M. P. Carmelo, D. Bozi, K. Penc
We extend to initial ground states with zero spin density m = 0 the expressions provided by the pseudofermion dynamical theory (PDT) for the finite-energy one- and two-electron spe…
Charge and Spin Transport in the One-dimensional Hubbard Model
Shi-Jian Gu, Nuno M. R. Peres, Jose M. P. Carmelo
In this paper we study the charge and spin currents transported by the elementary excitations of the one-dimensional Hubbard model. The corresponding current spectra are obtained b…
Role of symmetry in the interplay of T=0 quantum-phase transitions with unconventional T>0 transport properties in integrable quantum lattice systems
Jose. M. P. Carmelo, Shi-Jian. Gu, Nuno. M. R. Peres
We show that a generalized charge SU(2) symmetry of the one-dimensional (1D) Hubbard model in an infinitesimal flux generates half-filling states from metallic states which lea…
Pseudofermion scattering theory
J. M. P. Carmelo, D. Bozi, P. D. Sacramento
In this paper we study the scattering theory associated with the pseudofermion dynamical theory for the Hubbard chain. In terms of pseudofermions the spectral properties are contro…
Scattering theories for the 1D Hubbard model
J. M. P. Carmelo, K. E. Hibberd, N. Andrei
In one-dimensional (1D) non-perturbative many-electron problems such as the 1D Hubbard model the electronic charge and spin degrees of freedom separate into exotic quantum objects.…
Complex Electronic Behavior in a 1D Correlated Quantum Liquid
J. M. P. Carmelo
The relation of the rotated-electron site distribution configurations that describe the energy eigenstates of the one-dimensional Hubbard model to the momentum occupancy configurat…