Quantum Phases of Cold Bosonic Atoms in an Optical Lattice with Inhomogeneous Atomic Interactions and Coexistence of Multi Phases

We study cold bosonic atoms on a two-dimensional inhomogeneous optical lattice with site-dependent atomic interactions. With the tight-binding approximation, we derive the extended Bose–Hubbard model. Base on the mean-field approximation, the ground states are solved by the exact diagonalization met...

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Published inCommunications in theoretical physics Vol. 67; no. 4; pp. 421 - 424
Main Author 李艳英 侯净敏
Format Journal Article
LanguageEnglish
Published 01.04.2017
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ISSN0253-6102
DOI10.1088/0253-6102/67/4/421

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Abstract We study cold bosonic atoms on a two-dimensional inhomogeneous optical lattice with site-dependent atomic interactions. With the tight-binding approximation, we derive the extended Bose–Hubbard model. Base on the mean-field approximation, the ground states are solved by the exact diagonalization method. We calculate the mean-field order parameter and particle number density for the ground states. We find the coexistence of superfluid phase and Mott-insulator phase on the two-dimensional inhomogeneous optical lattice in appropriate parameter ranges.
AbstractList We study cold bosonic atoms on a two-dimensional inhomogeneous optical lattice with site-dependent atomic interactions. With the tight-binding approximation, we derive the extended Bose–Hubbard model. Base on the mean-field approximation, the ground states are solved by the exact diagonalization method. We calculate the mean-field order parameter and particle number density for the ground states. We find the coexistence of superfluid phase and Mott-insulator phase on the two-dimensional inhomogeneous optical lattice in appropriate parameter ranges.
Author 李艳英 侯净敏
AuthorAffiliation Department of Physics, Southeast University, Nanjing 211189, China
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Cites_doi 10.1103/PhysRevB.72.184507
10.1126/science.1192368
10.1103/PhysRevB.88.161101
10.1080/00018730701223200
10.1126/science.1209284
10.1103/PhysRevLett.88.170406
10.1103/PhysRevB.85.214524
10.1016/S0370-1573(99)00025-3
10.1103/PhysRevA.63.053601
10.1103/PhysRevA.85.021604
10.1038/nature09378
10.1142/S0217984909017820
10.1038/nature10748
10.1103/PhysRevLett.81.3108
10.1103/PhysRevA.67.063607
10.1103/PhysRevLett.96.180402
10.1038/415039a
10.1103/PhysRevLett.116.235301
10.1103/PhysRevA.70.023605
10.1103/PhysRevLett.96.180403
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Notes 11-2592/O3
We study cold bosonic atoms on a two-dimensional inhomogeneous optical lattice with site-dependent atomic interactions. With the tight-binding approximation, we derive the extended Bose–Hubbard model. Base on the mean-field approximation, the ground states are solved by the exact diagonalization method. We calculate the mean-field order parameter and particle number density for the ground states. We find the coexistence of superfluid phase and Mott-insulator phase on the two-dimensional inhomogeneous optical lattice in appropriate parameter ranges.
optical lattice quantum phase Bose–Hubbard model
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  doi: 10.1103/PhysRevB.72.184507
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Title Quantum Phases of Cold Bosonic Atoms in an Optical Lattice with Inhomogeneous Atomic Interactions and Coexistence of Multi Phases
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