2010/04/30 by Wesley Armour, John B. Kogut, Costas Strouthos · 10 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Coupling (piping) #Fermion #Gauge theory #Magnetic monopole #Physics #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Symmetry breaking #cond-mat.str-el #cond-mat.supr-con #hep-lat #hep-th
paper · pdf · doi:10.1103/physrevd.82.014503
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 82(1) (American Physical Society) · 20 pages, 9 figures
openalex publication_date 2010/07/09 · arxiv created 2010/07/20 · arxiv updated 2010/07/21 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present results from the first lattice simulations of three-dimensional noncompact quantum electrodynamics (QED3) with Nf four-component fermion flavors coupled to a weak Z2 chirally invariant four-fermi interaction. Results with Nf\ensuremath≥4 show that the scaling near the strong coupling chiral transition or sharp crossover is determined by the 3d Gross-Neveu ultraviolet-stable renormalization group fixed point. Small deviations of the Nf=4 critical exponents from the respective Gross-Neveu ones, hint at evidence for nonzero fermion mass generated by the gauge fields dynamics that might have been enhanced by the four-fermi coupling. It is also shown that the scaling region is suppressed at weak four-fermi couplings and large Nf values. Measurements of (i) a monopole susceptibility which is the polarizability of the monopole configurations, and (ii) the density of isolated monopoles, imply that for Nf\ensuremath≥1 and weak gauge couplings the monopoles do not affect the theory's confining properties, because they are shielded.