Coupled cluster description of field theories: Procedures and their application to the vacuum sector in (1+1)-dimensionalfield theories
- 15 September 1985
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 32 (6) , 1435-1444
- https://doi.org/10.1103/physrevd.32.1435
Abstract
General procedures for the application of the nonperturbative coupled cluster method (CCM) are described for one-component boson field theories. The basis set is optimized first by a Hartree-Bogolubov transformation. Then ‘‘correlations’’ are added via the CCM. This procedure is applied to two-dimensional field theory. The results are very stable outside the critical region.
Keywords
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