0509141v2

related topics
{classical, space, random}
{time, wave, function}
{let, theorem, proof}
{cos, sin, state}
{phase, path, phys}
{group, space, representation}
{wave, scattering, interference}
{energy, state, states}
{time, systems, information}
{equation, function, exp}

Continuous time quantum walks in phase space

Oliver Muelken, Alexander Blumen

abstract: 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.

oai_identifier:
oai:arXiv.org:quant-ph/0509141
categories:
quant-ph cond-mat.stat-mech
comments:
slightly revised version to be published in PRA, 6 pages, 6 color figures (high quality postscript figures are available upon request)
doi:
10.1103/PhysRevA.73.012105
arxiv_id:
quant-ph/0509141
journal_ref:
Phys. Rev. A 73, 012105 (2006)
created:
2005-09-21
updated:
2005-12-21

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