Irrational versus rational charge and statistics in two-dimensional quantum systems.
Phys Rev Lett
; 100(11): 110405, 2008 Mar 21.
Article
in En
| MEDLINE
| ID: mdl-18517765
ABSTRACT
We show that quasiparticle excitations with irrational charge and irrational exchange statistics exist in tight-binding 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 rerationalizes to the value 1/2 and the exchange statistics to that of "quartons" (half-semions).