RENORMALIZATION GROUP AND TRIVIALITY IN NONCOMPACT LATTICE QED WITH LIGHT FERMIONS
- 14 December 1992
- journal article
- Published by World Scientific Pub Co Pte Ltd in Modern Physics Letters A
- Vol. 7 (38) , 3561-3568
- https://doi.org/10.1142/s0217732392002974
Abstract
In the framework of noncompact lattice QED with light fermions, we derive the functional dependence of the average energy per plaquette on the bare parameters using blockspin Renormalization Group arguments and assuming that the renormalized coupling vanishes. Our numerical results for this quantity in 84 and 104 lattices show evidence for triviality in the weak coupling phase and point to a nonvanishing value for the renormalized coupling constant in the strong coupling phase.Keywords
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