Continuous time quantum walks in phase space

Details Continuous time quantum walks in phase space Continuous time quantum walks in phase space

2005-09-21

arxiv.org/abs/quant-ph/0509141v2

Phys. Rev. A 73, 012105 (2006)

Physics

Quantum Physics

slightly revised version to be published in PRA, 6 pages, 6 color figures (high quality postscript figures are available upon

Scientific paper

10.1103/PhysRevA.73.012105

We formulate continuous time quantum walks (CTQW) in a discrete quantum mechanical phase space. We define and calculate the Wigner function (WF) and its marginal distributions for CTQWs on circles of arbitrary length $N$. The WF of the CTQW shows characteristic features in phase space. Revivals of the probability distributions found for continuous and for discrete quantum carpets do manifest themselves as characteristic patterns in phase space.

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