Exact results for the Spectra of Bosons and Fermions with Contact Interaction

Details Exact results for the Spectra of Bosons and Fermions with Contact Interaction Exact results for the Spectra of Bosons and Fermions with Contact Interaction

2006-09-26

arxiv.org/abs/cond-mat/0609668v1

Nucl. Phys. B 763 (2007) 431

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

16 pages, LaTeX 2e

Scientific paper

10.1016/j.nuclphysb.2006.11.022

An N-body bosonic model with delta-contact interactions projected on the lowest Landau level is considered. For a given number of particles in a given angular momentum sector, any energy level can be obtained exactly by means of diagonalizing a finite matrix: they are roots of algebraic equations. A complete solution of the three-body problem is presented, some general properties of the N-body spectrum are pointed out, and a number of novel exact analytic eigenstates are obtained. The FQHE N-fermion model with Laplacian-delta interactions is also considered along the same lines of analysis. New exact eigenstates are proposed, along with the Slater determinant, whose eigenvalues are shown to be related to Catalan numbers.

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