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- W2034676986 abstract "We address the stability of superfluid currents in a system of interacting lattice bosons. We consider various Gutzwiller trial states for the quantum phase model which provides a good approximation for the Bose-Hubbard model in the limit of large interactions and boson populations. We thoroughly analyze the current-carrying stationary states of the dynamics ensuing from a Gaussian ansatz, and derive analytical results for the critical lines signaling their modulational and energetic instability, as well as the maximum of the carried current. We show that these analytical results are in good qualitative agreement with those obtained numerically in previous works on the Bose-Hubbard model, and in the present work for the quantum phase model." @default.
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- W2034676986 date "2013-06-20" @default.
- W2034676986 modified "2023-10-16" @default.
- W2034676986 title "Dynamic phase diagram for the quantum phase model" @default.
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- W2034676986 doi "https://doi.org/10.1103/physreva.87.063620" @default.
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