Temporal measurements in quantum theory

Charis Anastopoulos (University of Patras)

RESUMEN: The absence of a time operator makes the measurement of temporal quantities particularly difficult in quantum theory. We analyze the problems pertaining to the definition of quantum arrival-time probabilities and tunneling-time probabilities. Then, we present the Quantum Temporal Probabilities (QTP) method for describing measurement of temporal observables. The method involves a detailed modeling of the coupling between system and measuring apparatus, and the treatment of temporal variables as a coarse-grained quasi-classical observable associated to the apparatus. We present applications of the method in the arrival-time problem, in temporal measurements on entangled multi-partite systems, sequential measurements and tunneling.