Bose-Hubbard model with local two- and three-body interaction under off-diagonal confinement

21st Latin American Symposium on Solid State Physics

Cruz, G.J.^1 ; Franco, R.^1 ; Silva-Valencia, J.^1

Departamento de Física, Universidad Nacional de Colombia, Bogotá, Colombia^1

关键词: Bose Hubbard model;    Density matrix;    Density profile;    Local interactions;    Mixed state;    Three-body interaction;    Two-body interactions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/480/1/012003/pdf
DOI  :  10.1088/1742-6596/480/1/012003

来源: IOP

【 摘 要 】

We calculate the density profiles of a system of bosons with off-diagonal confinement and local interaction between two or three particles, using the density matrix renormalizaction group method. We found different ground-states: Mott insulator, superfluid and diverse mixed states. We observe that the Mott insulator lobes are surrounded by Mott insulator-superfluid coexistence state regardless the kind of the local interaction. The area of the Mott insulator lobes decreases for the two-body interactions and remain the same for three-body interactions.