SPIN-CHARGE SEPARATION, ANOMALOUS SCALING, AND THE COHERENCE OF HOPPING IN EXACTLY SOLVED 2-CHAIN MODELS

The coherence of transport between two one-dimensional interacting Fer mi liquids, coupled by single-particle hopping and interchain interact ion, is examined in the context of two exactly soluble models. It is f ound that the coherence of the interchain hopping depends on the inter play between interchain hopping and interchain interaction terms, and not simply on the ground state spectral properties of an isolated chai n. Specifically, the splitting of levels associated with interchain ho pping in a g(4) soluble model is found to be enhanced by the introduct ion of interchain interaction. It is also shown that, for an exactly s olvable model with both g(2) and g(4) interactions, coherent interchai n hopping coexists with anomalous scaling and non-Fermi liquid behavio r in the chain direction.