Once again about interchain hopping

TL;DR

This paper derives renormalization group equations and a phase diagram for a two-chain system with single-electron interchain hopping, aiming to correct previous results in the literature.

Contribution

It provides a corrected theoretical framework for understanding interchain hopping effects in coupled chain systems.

Findings

Derived new renormalization group equations.

Constructed a phase diagram for the system.

Corrected previous theoretical results.

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.\ {\bf 55}, 692 (1992) [JETP Lett.\ {\bf 55}, 724 (1992)].