We study a class of variational wave functions for strongly interacting one-dimensional lattice fermions in which correlations among the particles are specified by a single variational parameter. We find that the wave functions describe the ground-state properties of the one-dimensional t-J model remarkably well over the entire phase diagram in which interaction strength and density are varied. Specifically the wave function describes a Tomonaga-Luttinger liquid at low Jit, a phase-separated state at large Jit, and a stable state with infinite compressibility between these phases at low densities.
Rapid Communications are intended for the accelerated publication of important new results and are therefore given priority treatment both in the editorial office and in production A. Rapid Communication in Physical Review 8 should be no longer than 4 printed pages and must be accompanied by an abstract Pag.e proofs are sent to authorsWe study a class of variational wave functions for strongly correlated systems by expanding the electron operators as composites of spin-2 Fermi fields and spinless Fermi fields. The composite particles automatically satisfy the local constraint of no double occupancy and include correlations between opposite-spin particles in a very physical way. We calculate the energy and correlation functions for the one-dimensional
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