Logarithmic triviality of scalar quantum electrodynamics

M. Baig, H. Fort, J. B. Kogut, S. Kim, D. K. Sinclair
1993 Physical Review D, Particles and fields  
Using finite size scaling and histogram methods we obtain numerical results from lattice simulations indicating the logarithmic triviality of scalar quantum electrodynamics, even when the bare gauge coupling is chosen large. Simulations of the non-compact formulation of the lattice abelian Higgs model with fixed length scalar fields on L^4 lattices with L ranging from 6 through 20 indicate a line of second order critical points. Fluctuation-induced first order transitions are ruled out. Runs of
more » ... over ten million sweeps for each L produce specific heat peaks which grow logarithmically with L and whose critical couplings shift with L picking out a correlation length exponent of 0.50(5) consistent with mean field theory. This behavior is qualitatively similar to that found in pure λϕ^4.
doi:10.1103/physrevd.48.r2385 pmid:10016554 fatcat:emz54cv4brbhzpjlvgwsbiak6m