Abstract
Abstract The Hubbard model has been studied for a long time as a simplified model for electron correlation problems such as the metal-insulator transition, itinerant magnetism, and so on. Moreover, the discovery of high 7;, superconductors has again raised an important question about the strong correlation problem near the metal-insulator transition, including low-dimensional quantum fluctuations (Anderson 1987). In recent works, we have precisely studied various thermodynamic properties of the one-dimensional Hubbard model (Kawakami et al. 1989; Usuki et al. 1989) and clarified the underlying physics near the Mott insulator in terms of the dressed particles of the Bethe ansatz method (Kawakami and Okiji 1989a, b). In this brief report, we present the exact calculation for the dressed particles in the Hubbard chain near the Mott insulator.
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