Variational Cumulant Expansion in Lattice Gauge Theory

Zheng, Xi-Te; Tan, Zu-Guo; Wang, Jie

doi:10.1016/0550-3213(87)90101-5

Variational Cumulant Expansion in Lattice Gauge Theory

Xi-Te Zheng
(
- Chengdu U. of Sci. Tech.
)
,
Zu-Guo Tan
(
- Chengdu U. of Sci. Tech.
)
,
Jie Wang
(
- Chengdu U. of Sci. Tech.
)

1987

18 pages

Published in:

Nucl.Phys.B 287 (1987) 171-188

DOI:

10.1016/0550-3213(87)90101-5

View in:

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Abstract: (Elsevier)

A variational method in the lagrangian formalism combined with a cumulant expansion of its order-by-order corrections is developed. The technique for dealing with the expansion is presented in a systematic way. As an example, the order parameter E p ≡ 〈(1/ N )tr U p 〉 for the SU(2) pure gauge Wilson model is evaluated to the 4th order correction in four and five dimensions and is in good agreement with the Monte Carlo results.

GAUGE FIELD THEORY: SU(2)
LATTICE FIELD THEORY: FOUR-DIMENSIONAL
LATTICE FIELD THEORY: FIVE-DIMENSIONAL
PERTURBATION THEORY: HIGHER-ORDER
ENERGY
EXPANSION
NUMERICAL CALCULATIONS: VARIATIONAL

References(30)

Figures(0)

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