Convergence of coined quantum walks on d-dimensional Euclidean space

Details Convergence of coined quantum walks on d-dimensional Euclidean space Convergence of coined quantum walks on d-dimensional Euclidean space

2004-06-11

arxiv.org/abs/quant-ph/0406072v1

Physics

Quantum Physics

11 pages

Scientific paper

Coined quantum walks may be interpreted as the motion in position space of a quantum particle with a spin degree of freedom; the dynamics are determined by iterating a unitary transformation which is the product of a spin transformation and a translation conditional on the spin state. Coined quantum walks on the d-dimensional lattice can be treated as special cases of coined quantum walks on d-dimensional Euclidean space. We study quantum walks on d-dimensional Euclidean space and prove that the sequence of rescaled probability distributions in position space associated to the unitary evolution of the particle converges to a limit distribution.

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