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Matches in SemOpenAlex for { <https://semopenalex.org/work/W1985236468> ?p ?o ?g. }

• W1985236468 abstract "We present quantum Monte Carlo simulations of the soft-core Bosonic Hubbard model with a ring exchange term $K$. For values of $K$ which exceed roughly half the on-site repulsion $U$, the density is a nonmonotonic function of the chemical potential, indicating that the system has a tendency to phase separate. This behavior is confirmed by an examination of the density-density structure factor at small momenta and real-space images of the boson configurations. Adding a near-neighbor repulsion can compete with phase separation, but still does not give rise to a stable normal Bose liquid." @default.
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• W1985236468 date "2005-08-26" @default.
• W1985236468 modified "2023-10-17" @default.
• W1985236468 title "Ring exchange and phase separation in the two-dimensional boson Hubbard model" @default.
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• W1985236468 doi "https://doi.org/10.1103/physrevb.72.054524" @default.
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