Consciousness presents a series of characteristics that have been observed through- out the years: unity, continuity, richness and robustness are some of them. It manifests itself in regions of the brain capable of processing a huge quantity of integrated information with a level of neural activity close to criticality. We argue that the physics of consciousness cannot be exclusively based on classical physics. Consciousness unity cannot be explained classically as the classical properties are always Humean like a mosaic. One needs an entangled quantum system that can at least satisfy part of the functions of a quantum computer to allow to generate an inner aspect with the unity of consciousness and to couple with a classical system that gives it simultaneous access to preprocessed information at the neural level and to produce events that generate neural firings.