Fundamental decoherence in quantum gravity
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A recently introduced discrete formalism allows to solve the problem of time in quantum gravity in a relational manner. Quantum mechanics formulated with a relational time is not exactly unitary and implies a fundamental mechanism for decoherence of quantum states. The mechanism is strong enough to render the black hole information puzzle unobservable.
6 pages, to appear in the proceedings of DICE 2004 (Piombino, Italy)
6 pages, to appear in the proceedings of DICE 2004 (Piombino, Italy)