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Department of Physics and Physical Oceanography Colloquium “Time in Quantum Mechanics” Dr. Curt Moyer Department of Physics, University of North Carolina Wilmington The treatment of time in quantum mechanics remains one of the challenging open questions in the foundations of quantum theory. On the one hand, time is the parameter entering the Schrödinger equation and measured by an external laboratory clock. But time also plays the role of an observable in questions involving the occurrence of an event (e.g. when a nucleon decays, or when a particle emerges from a potential barrier), and like any observable should be represented in the theory by an operator whose eigenstates and eigenvalues are predictors of the outcome of [time] measurements made on physical systems. Yet no time operators occur in ordinary quantum mechanics. At its core, this is the quantum time problem. Following a brief historical review of the subject, I will describe an approach to this problem that emphasizes time states over time operators as the fundamental construct. Some specific results old and new will be reported, and the broader implications for conventional quantum theory will be addressed. Friday, April 5, 2013 2:00 PM DeLoach Hall, Room 212