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

被引：0
作者：
Li, Yan-Ying [1 ]
Hou, Jing-Min [1 ]
机构：
[1] Southeast Univ, Dept Phys, Nanjing 211189, Jiangsu, Peoples R China
来源：
COMMUNICATIONS IN THEORETICAL PHYSICS | 2017年 / 67卷 / 04期
基金：
中国国家自然科学基金;
关键词：
optical lattice; quantum phase; Bose-Hubbard model; MOTT INSULATOR; TRANSITION; SUPERFLUID;
D O I：
10.1088/0253-6102/67/4/421
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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.
引用
收藏
页码：421 / 424
页数：4
相关论文
共 20 条
  • [1] Probing the Superfluid-to-Mott Insulator Transition at the Single-Atom Level
    Bakr, W. S.
    Peng, A.
    Tai, M. E.
    Ma, R.
    Simon, J.
    Gillen, J. I.
    Foelling, S.
    Pollet, L.
    Greiner, M.
    [J]. SCIENCE, 2010, 329 (5991) : 547 - 550
  • [2] Light-cone-like spreading of correlations in a quantum many-body system
    Cheneau, Marc
    Barmettler, Peter
    Poletti, Dario
    Endres, Manuel
    Schauss, Peter
    Fukuhara, Takeshi
    Gross, Christian
    Bloch, Immanuel
    Kollath, Corinna
    Kuhr, Stefan
    [J]. NATURE, 2012, 481 (7382) : 484 - 487
  • [3] Observation of 2D Fermionic Mott Insulators of 40K with Single-Site Resolution
    Cheuk, Lawrence W.
    Nichols, Matthew A.
    Lawrence, Katherine R.
    Okan, Melih
    Zhang, Hao
    Zwierlein, Martin W.
    [J]. PHYSICAL REVIEW LETTERS, 2016, 116 (23)
  • [4] Endres M, 2011, SCIENCE, V334, P200, DOI [10.1126/science.1209284, 10.1126/science.1210268]
  • [5] Harmonically trapped dipolar fermions in a two-dimensional square lattice
    Gadsbolle, Anne-Louise
    Bruun, G. M.
    [J]. PHYSICAL REVIEW A, 2012, 85 (02):
  • [6] Quantum phases of dipolar bosons in optical lattices -: art. no. 170406
    Góral, K
    Santos, L
    Lewenstein, M
    [J]. PHYSICAL REVIEW LETTERS, 2002, 88 (17) : 4
  • [7] Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
    Greiner, M
    Mandel, O
    Esslinger, T
    Hänsch, TW
    Bloch, I
    [J]. NATURE, 2002, 415 (6867) : 39 - 44
  • [8] Bose-Fermi mixtures in a three-dimensional optical lattice
    Guenter, Kenneth
    Stoeferle, Thilo
    Moritz, Henning
    Koehl, Michael
    Esslinger, Tilman
    [J]. PHYSICAL REVIEW LETTERS, 2006, 96 (18)
  • [9] Complex phases in the doped two-species bosonic Hubbard model
    Hettiarachchilage, Kalani
    Rousseau, Valery G.
    Tam, Ka-Ming
    Jarrell, Mark
    Moreno, Juana
    [J]. PHYSICAL REVIEW B, 2013, 88 (16)
  • [10] QUANTUM PHASES OF ULTRACOLD BOSONIC ATOMS IN A TWO-DIMENSIONAL OPTICAL SUPERLATTICE
    Hou, Jing-Min
    [J]. MODERN PHYSICS LETTERS B, 2009, 23 (01): : 25 - 33
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