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Bosonization and phase Diagram of the one-dimensional t-J model

Guang-Hong Chen·Yong-Shi Wu
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Abstract

We present an analytic study of the phase diagram of the one-dimensional t-J model and a couple of its cousins. To deal with the interactions induced by the no double occupancy constraints, we introduce a deformation of the Hubbard operators. When the deformation parameter $Δ$ is small, the induced interactions are softened, accessible by perturbation theory. We combine bososnization with renormalization group techniques to map out the phase diagram of the system. We argue that when $Δ\to 1$, there is no essential change in the phase diagram. Comparison with the existing results in the literature obtained by other methods justifies our deformation approach.

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Guang-Hong Chen, Yong-Shi Wu. 2002-05-21. Bosonization and phase Diagram of the one-dimensional t-J model. https://doi.org/10.1103/physrevb.66.155111

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