2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/29436Recent developments in the analysis of finite temperature dissipationless transport in integrable quantum many body problems are presented. In particular, we will discuss: (i) the role played by the conservation laws in systems as the spin 1/2 Heisenberg chain and the one-dimensional Hubbard model, (ii) exact results obtained using the Bethe ansatz method on the long time decay of current correlations.Proceedings of the 1999 "Rencontres de Moriond" Conference, 5 pages, 1 Postscript figureCondensed Mattertext