A quantum Peierls-Nabarro barrier

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dc.creatorSpeight, J. M.
dc.date2000-03-02
dc.date.accessioned2026-07-07T10:53:19Z
dc.date.available2026-07-07T10:53:19Z
dc.descriptionKink dynamics in spatially discrete nonlinear Klein-Gordon systems is considered. For special choices of the substrate potential, such systems support continuous translation orbits of static kinks with no (classical) Peierls-Nabarro barrier. It is shown that these kinks experience, nevertheless, a lattice-periodic confining potential, due to purely quantum effects anaolgous to the Casimir effect of quantum field theory. The resulting ``quantum Peierls-Nabarro potential'' may be calculated in the weak coupling approximation by a simple and computationally cheap numerical algorithm, which is applied, for purposes of illustration, to a certain two-parameter family of substrates.
dc.description13 pages LaTeX, 7 figures
dc.identifierhttps://arxiv.org/abs/hep-th/0003015
dc.identifierhttp://arxiv.org/abs/hep-th/0003015
dc.identifierJ.Phys.A33:4741-4754,2000
dc.identifierdoi:10.1088/0305-4470/33/26/302
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/185445
dc.subjectHigh Energy Physics - Theory
dc.titleA quantum Peierls-Nabarro barrier
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