A Supercomputer Study of Strongly Coupled {QED}
Aug, 198831 pages
Published in:
- Nucl.Phys.B 317 (1989) 271-301
- Published: 1989
Report number:
- ILL-TH-88-31
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Abstract: (Elsevier)
We study non-compact QED with light dynamical fermions using hybrid algorithms for N = 2 and 4 species of light fermion. We present evidence from measurements of the chiral condensate on 6 4 , 8 4 and 10 4 lattices that the theory has an interacting ultraviolet stable fixed point. Simulations on 2×8 3 , 4×8 3 , 6×12 2 and 8×16 3 lattices indicate that the theories have nontrivial temperature dependence and their dynamics generates a large correlation length. Simulations of the π, ϱ, A 1 , σ mesons and the photon and fermion propagators are done on 6 3 ×12 lattices. The level ordering of the mesons is m π < m σ < m ϱ < m A 1 . The photon mass, inferred from its propagator in the Landau gauge, is zero.- QUANTUM ELECTRODYNAMICS
- MODEL: STRONG COUPLING
- STRONG COUPLING: MODEL
- FERMION: CONDENSATION
- LATTICE FIELD THEORY: CRITICAL PHENOMENA
- field theory: finite temperature
- CORRELATION: LENGTH
- MESON: HADRON SPECTROSCOPY
- PHOTON: PROPAGATOR
- FERMION: PROPAGATOR
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