Abstract
QED in 2+1 dimensions, analyzed in the expansion, is shown to exhibit a critical behavior as the number of fermions approaches . The dynamical mass has a universal scaling behavior at the critical point. The existence of criticality is discovered first by an analytic study of the gap equation and the effective potential. Its existence and universality is then confirmed numerically. Similarities to four-dimensional theories are discussed.
- Received 7 April 1988
DOI:https://doi.org/10.1103/PhysRevLett.60.2575
©1988 American Physical Society