Once again about interchain hopping
Abstract
Renormalization group equations and a phase diagram are derived for a system of two chains with a single-electron hopping between chains in order to correct the results of a recent paper by F.~V.~Kusmartsev, A.~Luther, and A.~Nersesyan, Pis'ma v Zh.\ Exp.\ Teor.\ Fiz.\ 55, 692 (1992) [JETP Lett.\ 55, 724 (1992)].
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