Non-mean-field exponents in strongly coupled quenched QED

Journal Article · Fri Mar 15 00:00:00 EST 1991 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.43.R1763· OSTI ID:5845719

Dagotto, E ^[1]; Kogut, J B ^[2]; Kocic, A ^[3]

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1. Institute for Theoretical Physics, University of California, Santa Barbara, California 93106 (USA)
2. Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (USA)
3. Department of Physics, University of Arizona, Tucson, Arizona 85721 (USA)

We study quenched quantum electrodynamics (QED) on a lattice in the noncompact formulation. Near the chiral critical point, we avoid critical slowing down using fast-Fourier-transform methods which allow us to obtain critical indices with good accuracy. Using lattices of 16{sup 4} and 24{sup 4} sites and masses between 0.025 and 0.0007 (lattice units) we found that the critical behavior of QED is described by power laws with critical exponents differing from mean-field results. The critical coupling is {beta}{sub {ital c}}=0.257{plus minus}0.001, the exponent {delta} is 2.2{plus minus}0.1, and the magnetic exponent {beta}{sub {ital m}} is 0.78{plus minus}0.08. A physical explanation of our results is presented.

• DOE Contract Number: FG02-85ER40231
• OSTI ID: 5845719
• Journal Information: Physical Review, D (Particles Fields); (USA), Vol. 43:6; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
LATTICE FIELD THEORY
SYMMETRY BREAKING
QUANTUM ELECTRODYNAMICS
CHIRAL SYMMETRY
MEAN-FIELD THEORY
STRONG-COUPLING MODEL
ELECTRODYNAMICS
FIELD THEORIES
MATHEMATICAL MODELS
PARTICLE MODELS
QUANTUM FIELD THEORY
SYMMETRY
645400* - High Energy Physics- Field Theory