The Coupled Cluster Method in Hamiltonian Lattice Field Theory

Details The Coupled Cluster Method in Hamiltonian Lattice Field Theory The Coupled Cluster Method in Hamiltonian Lattice Field Theory

1996-03-30

arxiv.org/abs/hep-lat/9603026v1

Phys.Rev. D55 (1997) 2974-2986

Physics

High Energy Physics

High Energy Physics - Lattice

LaTeX, no figure

Scientific paper

10.1103/PhysRevD.55.2974

The coupled cluster or exp S form of the eigenvalue problem for lattice Hamiltonian QCD (without quarks) is investigated. A new construction prescription is given for the calculation of the relevant coupled cluster matrix elements with respect to an orthogonal and independent loop space basis. The method avoids the explicit introduction of gauge group coupling coefficients by mapping the eigenvalue problem onto a suitable set of character functions, which allows a simplified procedure. Using appropriate group theoretical methods, we show that it is possible to set up the eigenvalue problem for eigenstates having arbitrary lattice momentum and lattice angular momentum.

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