Superfluid-Insulator Transitions in Attractive Bose-Hubbard Model with Three-Body Constraint - Condensed Matter > Quantum GasesReport as inadecuate




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Abstract: By means of the method of the effective potential, the phase transitions fromthe Mott insulating state to either the atomic or the dimer superfluid state inthe three-body constrained attractive Bose lattice gas are analyzed. Due to theappearance of the Feshbach resonance coupling between the two kinds of orderparameters in the derived effective potential function, it is found that thecontinuous Mott insulator-to-superfluid transitions can be preempted byfirst-order ones. Since the employed approach can provide accurate predictionsof phase boundaries in the strong coupling limit, where the dimer superfluidphase can emerge, our work hence sheds light on the search of this novel phasein real ultracold Bose gases in optical lattices.



Author: Yu-Wen Lee, Min-Fong Yang

Source: https://arxiv.org/







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