Irrational vs. rational charge and statistics in two-dimensional quantum systems

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We show that quasiparticle excitations with irrational charge and irrational exchange statistics exist in tight-biding systems described, in the continuum approximation, by the Dirac equation in (2+1)-dimensional space and time. These excitations can be deconfined at zero temperature, but when they are, the charge re-rationalizes to the value 1/2 and the exchange statistics to that of "quartons" (half-semions).
4 pages, 2 figures

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Strongly Correlated Electrons, Mesoscale and Nanoscale Physics, High Energy Physics - Theory, Mathematical Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/193005

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0707.0293
 http://arxiv.org/abs/0707.0293
 Phys.Rev.Lett.100:110405,2008
 doi:10.1103/PhysRevLett.100.110405

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arXiv