Landau Transport equations in slave-boson mean-field theory of t-J model

TL;DR

This paper extends slave-boson mean-field theory to include time-dependent transport equations for the t-J model, capturing strong correlation effects and lattice influences in normal and superconducting states.

Contribution

It derives explicit Landau-like transport equations for the t-J model within a refined U(1) gauge framework, incorporating lattice and strong correlation effects.

Findings

Transport equations mirror Landau Fermi liquid theory

Explicit Landau parameters derived for t-J model

Discusses experimental implications of the theory

Abstract

In this paper we generalize slave-boson mean-field theory for $t-J$ model to the time-dependent regime, and derive transport equations for $t-J$ model, both in the normal and superconducting states. By eliminating the boson and constraint fields exactly in the equations of motion we obtain a set of transport equations for fermions which have the same form as Landau transport equations for normal Fermi liquid and Fermi liquid superconductor, respectively with all Landau parameters explicity given. Our theory can be viewed as a refined version of U(1) Gauge theory where all lattice effects are retained and strong correlation effects are reflected as strong Fermi-liquid interactions in the transport equation. Some experimental consequences are discussed.