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VOLUME 56 (1992) | ISSUE 2 | PAGE 124
Erratum: Dense (2+1)-dimensional QED in an external magnetic field [JETP Lett. 55, No. 12, 703-706 (1992)]
There is an error, for which the author is responsible. Expression (7) should be ρ(Β,μ) = (eB/4-rr) + Ð{Å÷/2ÔÇ), where η = 1 + [ μ2 — m2/2eB ] for μ>ιη, η = 0 for \μ\<τη, and η = — [ μ2 — m2/2eB ] for μ< — Ô. The medium is neutral if μ = — (m2 + 2eB)1/2, and the single-loop effective Lagrangian in neutral QED2+1 is LeS= [(Å2/Ô)(÷2/24ÔÇ)] (\eB |/4ÔÇ)(m2 + 2\eB |)1/2. It follows from the latter expression that the magnetization is M(B)~ — {\em\/Air) signB, and that the magnetic field in the system, B, is given as a function of the external field Η by Η = ÷ + (\em\/4ir) signB. This result corresponds to the Meissner effect.