Comparison between linked-cluster expansion methods for the U(1) lattice gauge model in 2+1 dimensions

Journal Article · Thu Feb 01 00:00:00 EST 1996 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.53.1429· OSTI ID:278574

Hamer, C J; Weihong, Z; Oitmaa, J ^[1]

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1. School of Physics, The University of New South Wales, Sydney, New South Wales 2052 (Australia)

Comparisons are made between two different linked-cluster expansion methods, namely, the {ital t} expansion and the strong-coupling series expansion, as applied to the compact U(1) lattice gauge model in 2+1 dimensions. Connected moments of the Hamiltonian are calculated up to 28th order, extending previous results of Morningstar, and are used to form a {ital t} expansion. The {ital t} expansion is technically easier to calculate, and can give estimates of the axial string tension, which the strong-coupling series expansion cannot; but the strong-coupling series expansion gives better results for the mass gaps. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 278574
• Journal Information: Physical Review, D, Vol. 53, Issue 3; Other Information: PBD: Feb 1996
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
LATTICE FIELD THEORY
CLUSTER EXPANSION
UNIFIED GAUGE MODELS
THREE-DIMENSIONAL CALCULATIONS
U-1 GROUPS
HAMILTONIANS
MASS