Quantum backflow and scattering

Bostelmann, Henning, Cadamuro, Daniela and Lechner, Gandalf ORCID: https://orcid.org/0000-0002-8829-3121 2017. Quantum backflow and scattering. Physical Review a 96 (1) , 012112. 10.1103/PhysRevA.96.012112

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Abstract

Backflow is the phenomenon that the probability current of a quantum particle on the line can flow in the direction opposite to its momentum. In this article, previous investigations of backflow, pertaining to interaction-free dynamics or purely kinematical aspects, are extended to scattering situations in short-range potentials. It is shown that backflow is a universal quantum effect which exists in any such potential, and is always of bounded spatial extent in a specific sense. The effects of reflection and transmission processes on backflow are investigated, both analytically for general potentials, and numerically in various concrete examples.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Mathematics
Subjects:	Q Science > QA Mathematics Q Science > QC Physics
Publisher:	American Physical Society
ISSN:	1050-2947
Date of First Compliant Deposit:	25 May 2017
Date of Acceptance:	24 May 2017
Last Modified:	06 Nov 2024 19:00
URI:	https://orca.cardiff.ac.uk/id/eprint/100890

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