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Infrared cutoff dependence of the critical flavor number in three-dimensional QED

V. P. Gusynin·M. Reenders
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Abstract

We solve, analytically and numerically, a gap equation in parity invariant QED_3 in the presence of an infrared cutoff μand derive an expression for the critical fermion number N_c as a function of μ. We argue that this dependence of N_c on the infrared scale might solve the discrepancy between continuum Schwinger-Dyson equations studies and lattice simulations of QED_3.

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V. P. Gusynin, M. Reenders. 2003-07-30. Infrared cutoff dependence of the critical flavor number in three-dimensional QED. https://doi.org/10.1103/physrevd.68.025017

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