Phase separation in the two-dimensional bosonic Hubbard model with ring exchange |
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| Authors: | Rousseau V Batrouni G G Scalettar R T |
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| Institution: | Institut Non-Linéaire de Nice, Université de Nice-Sophia Antipolis, 1361 route des Lucioles, 06560 Valbonne, France. |
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| Abstract: | We show that soft-core bosons in two dimensions with a ring exchange term exhibit a tendency for phase separation. This observation suggests that the thermodynamic stability of normal Bose liquid phases driven by ring exchange should be carefully examined. |
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