2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/56549The collective dynamics of a many-body system is described as a special case of low-energy quantum dynamics, occurring when the ground state breaks a continuous symmetry of the Hamiltonian. This approach is applied to the spontaneous breaking of the rotational symmetry of a nuclear Hamiltonian. It is shown that the excitation operator of the isovector low-lying angular oscillations in deformed nuclei is a linear combination between angular momentum operators, which generate static rotations, and "angle" operators, which generate the transition to a rotating frame.Related articles: Phys. Rev. C54 706 (1996), C57 1218 (1998)Mathematical PhysicsGeneral Relativity and Quantum CosmologyNuclear TheoryQuantum Physicstext