Directional correlations in quantum walks with two particles

Details Directional correlations in quantum walks with two particles Directional correlations in quantum walks with two particles

2011-02-22

arxiv.org/abs/1102.4445v1

New J. Phys. 13 033029 (2011)

Physics

Quantum Physics

Scientific paper

Quantum walks on the line with a single particle possess a classical analog. Involving more walkers opens up the possibility to study collective quantum effects, such as many particle correlations. In this context, entangled initial states and indistinguishability of the particles play a role. We consider 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 introducing $\delta$-interaction between the particles, one can exceed the limits for non-interacting particles.

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