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• W2029603809 abstract "Motivated by the recent rapid development of the field of quantum gases in optical lattices, we present a comprehensive study of the spectrum of ultracold atoms in a one-dimensional optical lattice subjected to a periodic lattice modulation. Using the time-dependent density-matrix renormalization group method, we study the dynamical response due to lattice modulations in different quantum phases of the system with varying density. For the Mott insulating state, we identify several excitation processes, which provide important information about the density profile of the gases. For the superfluid, the dynamical response can be well described in a local density approximation. This simplification can be valuable in understanding the strong-correlated superfluid in a slow-varying harmonic potential. All these spectroscopic features of an inhomogeneous system can be used as a test for the validity of the Bose-Hubbard model in a parabolic trapping potential." @default.
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• W2029603809 date "2011-10-07" @default.
• W2029603809 modified "2023-10-01" @default.
• W2029603809 title "Trapped ultracold bosons in periodically modulated lattices" @default.
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• W2029603809 doi "https://doi.org/10.1103/physreva.84.043608" @default.
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