Integral charge quasiparticles in a fractional quantum Hall liquid

Abstract

Starting from a collective description of the incompressible fractional quantum Hall liquid as an elastic medium that supports gapped neutral excitations, I show that the one-electron spectral function of this system exhibits a sharp peak at the lowest available excitation energy, well separated from the continuum spectrum at higher energy. I interpret this peak as the signature of the integral charge quasiparticle recently predicted by Peterson and Jain [Phys. Rev. Lett. 94, 186808 (2005)] and calculate its spectral weight for different filling factors.