2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/222470We propose a density matrix renormalization group (DMRG) technique at finite temperatures. As is the case of the ground state DMRG, we use a single-target state that is calculated by making use of a regulated polynomial expansion. Both static and dynamical quantities are obtained after a random-sampling and averaging procedure. We apply this technique to the one-dimensional Hubbard model at half filling and find that this gives excellent results at low temperatures.5 pages, 3 figures. Accepted for publication in Phys. Rev. BStrongly Correlated Electronstext