Correlation effects in one-dimensional systems

• Type: Article in International Conference Proceedings Book
• Date: 2007

Authors

J. M. P. Carmelo (Author) FEUP; P. D. Sacramento (Author) FEUP; D. Bozi (Author) FEUP; L. M. Martelo (Author) FEUP

Conference proceedings International

Title: Strongly Correlated Systems, Coherence and Entanglement

Pages: 29-59

Scientific classification

FOS: Natural sciences > Physical sciences

CORDIS: Physical sciences > Physics > Quantum mechanics

Other information

Abstract (EN): This paper follows its first companion paper. Here we review different meth- ods based on the Bethe ansatz solution of the one-dimensional Hubbard model, in order to study quantities related to charge transport and the momentum de- pendent conductivity. Moreover, we report recent developments on finite-energy dynamical properties. This is achieved by introducing new entities called pseud- ofermions which are basically free, in the sense that their energies are additive, and where the effect of the interactions appears through phase shifts that are absorbed by their discrete momentum values. The resulting pseudofermion dy- namical theory enables the evaluation of matrix elements between energy eigen- states and hence the derivation of finite energy expressions for the one- and two- electron correlation and spectral functions. Comparison with experimental re- sults is also discussed.

Language: Portuguese

Type (Professor's evaluation): Scientific