Interaction and particle-hole symmetry of Laughlin quasiparticles - art. no. 235322

The pseudopotentials describing interaction of Laughlin quasielectrons (QE) and quasiholes (QH) in an infinite fractional quantum Hall system are stud ied. The QE and QH pseudopotentials are similar, which suggests the (approx imate) particle-hole symmetry recovered in the thermodynamical limit. The p roblem of the hypothetical symmetry-breaking QE hard-core repulsion is reso lved by the estimate that the "forbidden'' QE pair state has too high an en ergy and is unstable. Strong oscillations of the QE and QH pseudopotentials persist in an infinite system, and the analogous QE and QH pair states wit h small relative angular momentum and nearly vanishing interaction energy a re predicted.