Abstract
We revisit the Bose–Hubbard model with hard-core three-body attractive interactions in one-dimension using the cluster mean-field theory with the density-matrix renormalization group. Our study focuses on the region of the phase diagram between density one Mott MI(1) and density three Mott MI(3) insulator lobes and studies the pairing of bosons. We calculate the order parameters and condensate factors corresponding to atomic and pair superfluid phases. We find no phase transition directly from MI(1) to MI(3) when the attractive three-body interaction is present. The pair superfluid dominates the region between MI(1) and MI(3) when the hopping parameter is small. As the hopping parameter increases, the model shows a phase transition to the atomic superfluid. However, the paring of bosons persists even in the atomic superfluid phases. We finally obtain the phase diagram and compare it with earlier results.
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Data Availability Statement
The data that support the findings of this study are available from the corresponding author upon reasonable request. This manuscript has no associated data or the data will not be deposited. [Authors’ comment: All results can be replicated using the numerical procedures described in the paper.]
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Assistance provided by Directorate of Higher Education, Government of Goa, India is acknowledged by the author (AD).
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Gaonkar, C.G.F., Gaude, P.P., Das, A. et al. Revisiting pairing of bosons in one-dimensional Bose–Hubbard model with three-body interaction using CMFT+DMRG method. Eur. Phys. J. D 78, 43 (2024). https://doi.org/10.1140/epjd/s10053-024-00834-6
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DOI: https://doi.org/10.1140/epjd/s10053-024-00834-6