Quasiperiodic dynamics of coherent diffusion: a quantum walk approach

Details Quasiperiodic dynamics of coherent diffusion: a quantum walk approach Quasiperiodic dynamics of coherent diffusion: a quantum walk approach

2004-07-16

arxiv.org/abs/quant-ph/0407128v1

Physics

Quantum Physics

Scientific paper

We study the dynamics of a generalization of quantum coin walk on the line which is a natural model for a diffusion modified by quantum or interference effects. In particular, our results provide surprisingly simple explanations to phenomena observed by Bouwmeester et al. (Phys. Rev. A, 61, 13410 (1999)) in their optical Galton board experiment, and a description of a stroboscopic quantum walks given by Buershaper and Burnett (quant-ph/0406039) through numerical simulations. We also provide heuristic explanations for the behavior of our model which show, in particular, that its dynamics can be viewed as a discrete version of Bloch oscillations.

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