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Equivalence between quantum backflow and classically forbidden probability flow in a diffraction-in-time problem

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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.

Original languageEnglish
Article number043626
JournalPhysical Review A
Volume99
Issue number4
DOIs
Publication statusPublished - 25 Apr 2019

Documents

  • 1903.02053

    Rights statement: Arseni Goussev. 'Equivalence between quantum backflow and classically forbidden probability flow in a diffraction-in-time problem.' Phys. Rev. A 99, 043626. © 2019 American Physical Society. All rights reserved.

    Accepted author manuscript (Post-print), 115 KB, PDF document

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