Time-of-flight images of Mott insulators in the Hofstadter-Bose-Hubbard model
arXiv:1504.02399 · doi:10.1103/PhysRevA.92.023636
Abstract
We analyze the momentum distribution function and its artificial-gauge-field dependence for the Mott insulator phases of the Hofstadter-Bose-Hubbard model. By benchmarking the results of the random-phase approximation (RPA) approach against those of the strong-coupling expansion (SCE) for the Landau and symmetric gauges, we find pronounced corrections to the former results in two dimensions.
5 pages with 1 figure
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