2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/207026Path integral techniques for the density matrix of a one-dimensional statistical system near a boundary previously employed in black-hole physics are applied to providing a new interpretation of the density matrix renormalization group: its efficacy is due to the concentration of quantum states near the boundary.8 pages, 3 figures, to appear in Mod. Phys. Lett. AStatistical MechanicsStrongly Correlated ElectronsHigh Energy Physics - Theorytext