2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/91943We predict the existence of novel first-order phase transitions in a general class of multi-qubit-cavity systems. Apart from atomic systems, the associated super-radiant phase transition should be observable in a variety of solid-state experimental systems, including the technologically important case of interacting quantum dots coupled to an optical cavity mode.To appear in Phys. Rev. LettQuantum PhysicsStatistical Mechanicstext