Relevance of Interlayer Pair Hopping Between Coupled Hubbard Chains

TL;DR

This paper investigates how the hopping of singlet electron pairs between coupled Hubbard chains affects the system's behavior, emphasizing the importance of interchain correlations in the renormalization process.

Contribution

It reveals that interlayer pair hopping is relevant under certain correlated conditions, providing new insights into coupled Hubbard chain systems.

Findings

Interlayer pair hopping influences system properties.

Relevance depends on specific interchain correlations.

Implications for understanding correlated electron systems.

Abstract

We demonstrate that the hopping of singlet electron pairs between Hubbard chains is relevant in the renormalization group sense if appropriate correlations exist between the chains.