Spacetime structures of continuous-time quantum walks

Spacetime structures of continuous-time quantum walks

The propagation by continuous-time quantum walks (CTQWs) on one-dimensional lattices shows structures in the transition probabilities between different sites reminiscent of quantum carpets. For a system with periodic boundary conditions, we calculate the transition probabilities for a CTQW by diagon...

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Veröffentlicht in:Physical review. E, Statistical, nonlinear, and soft matter physics Statistical, nonlinear, and soft matter physics, 2005-03, Vol.71 (3 Pt 2A), p.036128-036128, Article 036128
Hauptverfasser: Mülken, Oliver, Blumen, Alexander
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container_title Physical review. E, Statistical, nonlinear, and soft matter physics
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creator Mülken, Oliver
Blumen, Alexander
description The propagation by continuous-time quantum walks (CTQWs) on one-dimensional lattices shows structures in the transition probabilities between different sites reminiscent of quantum carpets. For a system with periodic boundary conditions, we calculate the transition probabilities for a CTQW by diagonalizing the transfer matrix and by a Bloch function ansatz. Remarkably, the results obtained for the Bloch function ansatz can be related to results from (discrete) generalized coined quantum walks. Furthermore, we show that here the first revival time turns out to be larger than for quantum carpets.
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