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- W4294492586 abstract "We investigate the ab-initio phase diagram of ultracold 87-Rb atoms in an one-dimensional two-color superlattice. Using single-particle band structure calculations we map the experimental setup onto the parameters of the Bose-Hubbard model. This ab-initio ansatz allows us to express the phase diagrams in terms of the experimental control parameters, i.e., the intensities of the lasers that form the optical superlattice. In order to solve the many-body problem for experimental system sizes we adopt the density-matrix renormalization-group algorithm. A detailed study of convergence and finite-size effects for all observables is presented. Our results show that all relevant quantum phases, i.e., superfluid, Mott-insulator, and quasi Bose-glass, can be accessed through intensity variation of the lasers alone. However, it turns out that the phase diagram is strongly affected by the longitudinal trapping potential." @default.
- W4294492586 created "2022-09-03" @default.
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- W4294492586 date "2010-05-18" @default.
- W4294492586 modified "2023-10-14" @default.
- W4294492586 title "Ab-initio phase diagram of ultracold 87-Rb in an one-dimensional two-color superlattice" @default.
- W4294492586 doi "https://doi.org/10.48550/arxiv.1005.3129" @default.
- W4294492586 hasPublicationYear "2010" @default.
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