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arxiv: cond-mat/9712307 · v2 · submitted 1997-12-29 · ❄️ cond-mat.supr-con

Phases of the one-dimensional Bose-Hubbard model

classification ❄️ cond-mat.supr-con
keywords phaseone-dimensionalbose-hubbardmodelordersuperfluidwithoutdiagrams
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The zero-temperature phase diagram of the one-dimensional Bose-Hubbard model with nearest-neighbor interaction is investigated using the Density-Matrix Renormalization Group. Recently normal phases without long-range order have been conjectured between the charge density wave phase and the superfluid phase in one-dimensional bosonic systems without disorder. Our calculations demonstrate that there is no intermediate phase in the one-dimensional Bose-Hubbard model but a simultaneous vanishing of crystalline order and appearance of superfluid order. The complete phase diagrams with and without nearest-neighbor interaction are obtained. Both phase diagrams show reentrance from the superfluid phase to the insulator phase.

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