Directional correlations in quantum walks with two particles

Štefaňák, M., Barnett, S.M. , Kollár, B., Kiss, T. and Jex, I. (2011) Directional correlations in quantum walks with two particles. New Journal of Physics, 13(3), 033029. (doi:10.1088/1367-2630/13/3/033029)

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Abstract

Quantum walks on a line with a single particle possess a classical analogue. Involving more walkers opens up the possibility of studying collective quantum effects, such as many-particle correlations. In this context, entangled initial states and the indistinguishability of the particles play a role. We consider the directional correlations between two particles performing a quantum walk on a line. For non-interacting particles, we find analytic asymptotic expressions and give the limits of directional correlations. We show that by introducing δ-interaction between the particles, one can exceed the limits for non-interacting particles.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Barnett, Professor Stephen
Authors: Štefaňák, M., Barnett, S.M., Kollár, B., Kiss, T., and Jex, I.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:New Journal of Physics
Publisher:Institute of Physics Publishing Ltd.
ISSN:1367-2630
ISSN (Online):1367-2630

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