2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/105458We show that a 2D harmonic oscillator coherent state is a soliton which has the same evolution as a spinning top: the center of mass follows a classical trajectory and the particle rotates around its center of mass in the same direction as its spin with the harmonic oscillator frequency.2 pagesQuantum Physicstext