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cond-mat1998
Optical absorption edge in one-dimensional conductors
J. M. P. Carmelo, P. D. Sacramento, N. M. R. Peres +1
The frequency-dependent conductivity is studied for both the one-dimensional Hubbard model and a model of spinless fermions, using a selection rule, the Bethe ansatz energy eigenst…
cond-mat1995
Electrons, pseudoparticles, and quasiparticles in one-dimensional interacting electronic systems
J. M. P. Carmelo, A. H. Castro Neto, N. M. R. Peres
We find the singular transformation between the electron operator and the pseudoparticle operators for the Hubbard chain. We generalize the concept of quasiparticle to one-dimensio…