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 |
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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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