Equivalence between quantum backflow and classically forbidden probability flow in a diffraction-in-time problem
arXiv:1903.02053 · doi:10.1103/PhysRevA.99.043626
Abstract
Quantum backflow is an interference effect in which a matter-wave packet comprised of only plane waves with non-negative momenta exhibits negative probability flux. Here we show that this effect is mathematically equivalent to the appearance of classically-forbidden probability flux when a matter-wave packet, initially confined to a semi-infinite line, expands in free space.
5 pages, no figures
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- Quantum backflow for many-particle systems
- Observation of single-photon azimuthal backflow with weak measurement
- Quantum Back Flow Across a Black Hole Horizon in a Toy Model Approach
- Different routes to the classical limit of backflow
- Quantum backflow for dissipative two-identical-particle systems
- Inequivalence of stochastic and Bohmian arrival times in time-of-flight experiments
- Quantum backflow current in a ring: Optimal bounds and fractality
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