2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/186284We explore the relation between classical and quantum states in both open and closed (super)strings discussing the relevance of coherent states as a semiclassical approximation. For the closed string sector a gauge-fixing of the residual world-sheet rigid translation symmetry of the light-cone gauge is needed for the construction to be possible. The circular target-space loop example is worked out explicitly.12 pagesHigh Energy Physics - Theorytext