The Full Laplace-Beltrami operator on U(N) and SU(N) [PDF]
O. L. Trinhammer, G. OlafssonThe Laplacian on the Lie groups U(N) and SU(N) is given in a parametrized edition for practical purposes. The radial part is often seen in work on lattice gauge theory, but here is derived also the off-diagonal part which in SU(3) and U(3) is expressed via the well known Gell-Mann matrices but with a more easily memorized notation. Relations to I, U and V spin are also shown.View original: http://arxiv.org/abs/9901002
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