A nonperturbative microscopic theory of Hamiltonian lattice gauge systems
R.F. Bishop, N.J. Davidson, and Y. Xian
TL;DR
This paper reviews the application of the coupled-cluster method to Hamiltonian lattice gauge models, providing a nonperturbative microscopic approach that extends strong-coupling perturbation results.
Contribution
It introduces a systematic microscopic formulation using CCM for lattice gauge systems, extending traditional strong-coupling perturbation theory.
Findings
CCM results extend strong-coupling perturbation theory
Provides a nonperturbative approach to lattice gauge models
Applicable to U(1) pure gauge sector
Abstract
A review is given of our recent application of a systematic microscopic formulation of quantum many-body theory, namely the coupled-cluster method (CCM), to Hamiltonian lattice gauge models in the pure gauge sector. It is emphasized that our CCM results represent a natural extension or resummation of the results from the strong-coupling perturbation theory.
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Taxonomy
TopicsQuantum many-body systems · Physics of Superconductivity and Magnetism · Theoretical and Computational Physics