The Laplacian on homogeneous spaces

Details The Laplacian on homogeneous spaces The Laplacian on homogeneous spaces

2008-05-16

arxiv.org/abs/0805.2531v1

J.Math.Phys.49:053513,2008

Physics

Mathematical Physics

Scientific paper

10.1063/1.2924268

The solution of the eigenvalue problem of the Laplacian on a general homogeneous space G/H is given. Here, G is a compact, semisimple Lie group, H is a closed subgroup of G, and the rank of H is equal to the rank of G. It is shown that the multiplicity of the lowest eigenvalue of the Laplacian on G/H is just the degeneracy of the lowest Landau level for a particle moving on G/H in the presence of the background gauge field. Moreover, the eigenspace of the lowest eigenvalue of the Laplacian on G/H is, up to a sign, equal to the G-equivariant index of the Dirac operator of Kostant on G/H.

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