Physics – Quantum Physics
Scientific paper
2002-05-22
Physics
Quantum Physics
1 eps figure
Scientific paper
10.1103/PhysRevA.67.032105
The measurement of time durations or instants of ocurrence of events has been frequently modelled ``operationally'' by coupling the system of interest to a ``clock''. According to several of these models the operational approach is limited at low energies because the perturbation of the clock does not allow to reproduce accurately the corresponding ideal time quantity, defined for the system in isolation. We show that, for a time-of-flight measurement model that can be set to measure dwell or arrival times, these limitations may be overcome by extending the range of energies where the clock works properly using pulsed couplings rather than continuous ones.
Alonso David
Mayato Rafael Sala
Muga Gonzalo J.
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