2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/138751A cranking harmonic oscillator model, widely used for the physics of fast rotating nuclei and Bose-Einstein condensates, is re-investigated in the context of PT-symmetry. The instability points of the model are identified as exceptional points. It is argued that - even though the Hamiltonian appears hermitian at first glance - it actually is not hermitian within the region of instability.4 pages, 1 figureQuantum Physicstext