Chaotic and regular dynamics in the three-site Bose-Hubbard model
arXiv:1910.12489 · doi:10.1063/5.0011540
Abstract
We analyze the energy spectrum of the three-site Bose-Hubbard model. It is shown that this spectrum is a mixture of the regular and irregular spectra associated with the regular and chaotic components of the classical Bose-Hubbard model. We find relative volumes of these components by using the pseudoclassical approach. Substituting these values in the Berry-Robnik distribution for the level spacing statistics we obtain good agreement with the numerical data.
arXiv comment8 pages, 6 figures
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