Chiral Operator Product Algebra and Edge Excitations of a Fractional Quantum Hall Droplet

Details Chiral Operator Product Algebra and Edge Excitations of a Fractional Quantum Hall Droplet Chiral Operator Product Algebra and Edge Excitations of a Fractional Quantum Hall Droplet

1993-11-16

arxiv.org/abs/cond-mat/9311038v1

Nucl. Phys. B, 422, 476 (1994)

Physics

Condensed Matter

18 pages, Plain TeX, MIT and U. of Utah preprint

Scientific paper

In this paper we study the spectrum of low-energy edge excitations of a fractional quantum Hall (FQH) droplet. We show how to generate, by conformal field theory (CFT) techniques, the many-electron wave functions for the edge states. And we propose to classify the spectrum of the edge states by the same chiral operator product algebra (OPA) that appears in the CFT description of the ground state in the bulk. This bulk-edge correspondence is suggested particularly for FQH systems that support quasiparticle obeying non-abelian braid statistics, including the $\nu=5/2$ Haldane-Rezayi state. Numerical diagonalization to count the low-lying edge states has been done for several non-abelian FQH systems, showing good agreement in all cases with the chiral OPA predictions. The specific heat of the edge excitations in those non-abelian states is also calculated.

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