2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/103360The spin-dependent corrections to the static interquark potential are relevant to describing the fine and hyper-fine splittings of the heavy quarkonium spectra. We investigate these corrections in SU(3) lattice gauge theory with the Polyakov loop correlation function as the quark source by applying the multi-level algorithm. We observe remarkably clean signals for the spin-dependent potentials up to intermediate distances.6 pages, Talk presented at Lattice 2005 (Heavy quark physics)High Energy Physics - Latticetext