The Coupled Cluster Method in Hamiltonian Lattice Field Theory

Abstract

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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References in corpus (3)

• The Shifted Coupled Cluster Method: A New Approach to Hamiltonian Lattice Gauge Theories
• Glueball Masses in QCD_3
• Universality for SU(2) Yang-Mills Theory in (2+1)D

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• Improved lattice QCD with quarks: the 2 dimensional case
• The Coupled Cluster Method in Hamiltonian Lattice Field Theory: SU(2) Glueballs
• Improving QCD with fermions: the 2 dimensional case of QCD with Sea Quarks