Large N Lattice QED

Abstract

We study the $\beta ,N$ critical behaviour of non compact QED with $N$ species of light fermions, using a method we have proposed for unquenched simulations. We find that there exist two phase transition lines: one, second order, and the other, first order, that approaches asymptotically the $\beta =0$ axis. These two lines have different physical origin, the second one being entirely due to fermions effects. We discuss the effect of the approximation used, in terms of an expansion of the effective action in powers of $N$, and conclude that the general features should not be affected by this approximation.

9 pages. LNF 92/110 P

References in corpus (1)

• Renormalization group and triviality in noncompact lattice QED with light fermions

Cited by in corpus (13)

• Spontaneous Symmetry Breaking in Fermion-Gauge Systems- A Non Standard Approach
• The Schwinger Model on the lattice in the Microcanonical Fermionic Average approach
• Chiral Susceptibilities in noncompact QED: a new determination of the $\gamma$ exponent and the critical couplings
• Fermionic effective action and the pahse estructure of non compact quantum electrodynamics in 2+1 dimensions
• On the Interplay of Monopoles and Chiral Symmetry Breaking in Non-Compact Lattice QED
• Testing logarithmic violations to scaling in strongly coupled QED
• Strongly Coupled QED
• Electromagnetic Self-Duality in a Lattice Model
• Is the Chiral Phase Transition in Non-Compact Lattice QED Driven by Monopole Condensation?
• Non-compact Lattice QED with Two Charges: Phase Diagram and Renormalization Group Flow
• Chiral condensate, susceptibilities, critical coupling and indices in QED${}_4$
• Some Interesting Features of Noncompact QED_3
• New Method for Dynamical Fermions and Chiral-Symmetry Breaking