Instability at the origin in (2+1)-dimensional QED |
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| Authors: | Takayuki Matsuki |
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| Affiliation: | 1. Tsukuba Institute of Science and Technology, 1601 Kamitakatsu, 300, Tsuchiura, Ibaraki, Japan
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| Abstract: | Stability at the origin in (2+1)-dimensional QED withN four-component Dirac fermions is studied by keeping the leading order terms in 1/N in the effective potential. It is shown that the effective potential in the direction of fermion wave-function renormalization is always unstable for any flavor numberN, which reconfirms that chiral symmetry is broken for anyN. |
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