Quantum arrival time measurement and backflow effect
Juan Gonzalo Muga, José P. Palao, C. Richard Leavens · arXiv (Cornell University) · 1998
The current density for a freely evolving state without negative momentum components can temporarily be negative. The operational arrival time distribution, defined by the absorption rate of an ideal detector, is calculated for a model detector and compared with recently proposed distributions. Counterintuitive features of the backflow regime are discussed.