Coupled cluster analysis of the U(1) lattice gauge model using a correlated {open_quote}{open_quote}mean-field{close_quote}{close_quote} reference state
- Department of Physics, University of Manchester Institute of Science and Technology (UMIST), P.O. Box 88, Manchester M60 1QD (United Kingdom)
We apply the coupled cluster method (CCM) to the U(1) lattice gauge model in 2+1 dimensions, basing our analysis on a reference state which already contains a certain class of single-plaquette correlations, the so-called {open_quote}{open_quote}mean-field{close_quote}{close_quote} reference state. We consider the simplest possible approximation scheme for the coupled cluster calculation, in which only single-plaquette correlations are included. The use of the {open_quote}{open_quote}mean-field{close_quote}{close_quote} reference state allows us to reproduce, within this level of approximation, the correct leading-order behavior of the ground-state energy of the equivalent Mathieu problem in {ital both} the strong- and weak-coupling limits. In addition, we have calculated the mean plaquette and the odd- and even-parity mass gaps. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 279180
- Journal Information:
- Physical Review, D, Vol. 53, Issue 5; Other Information: PBD: Mar 1996
- Country of Publication:
- United States
- Language:
- English
Similar Records
Two phases for compact U(1) pure gauge theory in three dimensions
Search for {open_quotes}quadrupole-bound{close_quotes} anions. I.