2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/56300We propose an approximate wavefunction of the bound state of $N$ $D0$-branes. Its spread grows as $N^{1\over 3}$ per particle, i.e. it saturates the Polchinski's bound.12pp. harvmac big mode, v3. refs, title and preprint number changedHigh Energy Physics - Theorytext