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A new approach to quantum backflow

Markus Penz1, Gebhard Grübl1, Sabine Kreidl1 and Peter Wagner2

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We derive some rigorous results concerning the backflow operator introduced by Bracken and Melloy. We show that it is linear bounded, self-adjoint and non-compact. Thus the question is underlined whether the backflow constant is an eigenvalue of the backflow operator. From the position representation of the backflow operator, we obtain a more efficient method to determine the backflow constant. Finally, detailed position probability flow properties of a numerical approximation to the (perhaps improper) wavefunction of maximal backflow are displayed.


PACS

03.65.Ge Solutions of wave equations: bound states

02.10.Ud Linear algebra

02.30.Tb Operator theory

MSC

47G10 Integral operators (See also 45P05)

15A18 Eigenvalues, singular values, and eigenvectors

81Q05 Closed and approximate solutions to the Schrödinger, Dirac, Klein-Gordon and other quantum-mechanical equations

Subjects

Mathematical physics

Quantum information and quantum mechanics

Dates

Issue 2 (13 January 2006)

Received 11 August 2005, in final form 25 October 2005

Published 14 December 2005



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