Directional correlations in quantum walks with two particles

M. Štefaňák, S. M. Barnett, B. Kollár, T. Kiss, I. Jex

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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.

Original languageEnglish
Article number033029
JournalNew Journal of Physics
Volume13
DOIs
Publication statusPublished - Mar 1 2011

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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