中国物理B ›› 2025, Vol. 34 ›› Issue (8): 80304-080304.doi: 10.1088/1674-1056/add008

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Interacting bosons in a three-dimensional lattice

Dian-Cheng Zhang(张典承)1,† and Shi-Jie Yang(杨师杰)2   

  1. 1 College of Science, Hainan Tropical Ocean University, Sanya 572022, China;
    2 Department of Physics, Beijing Normal University, Beijing 100875, China
  • 收稿日期:2025-02-01 修回日期:2025-04-09 接受日期:2025-04-24 出版日期:2025-07-17 发布日期:2025-08-08
  • 通讯作者: Dian-Cheng Zhang E-mail:zhangdiancheng16@mails.ucas.ac.cn
  • 基金资助:
    Project supported by the Hainan Provincial Natural Science Foundation of China (Grant No. 525QN342) and the Scientific Research Foundation of Hainan Tropical Ocean University (Grant No. RHDRC202301).

Interacting bosons in a three-dimensional lattice

Dian-Cheng Zhang(张典承)1,† and Shi-Jie Yang(杨师杰)2   

  1. 1 College of Science, Hainan Tropical Ocean University, Sanya 572022, China;
    2 Department of Physics, Beijing Normal University, Beijing 100875, China
  • Received:2025-02-01 Revised:2025-04-09 Accepted:2025-04-24 Online:2025-07-17 Published:2025-08-08
  • Contact: Dian-Cheng Zhang E-mail:zhangdiancheng16@mails.ucas.ac.cn
  • Supported by:
    Project supported by the Hainan Provincial Natural Science Foundation of China (Grant No. 525QN342) and the Scientific Research Foundation of Hainan Tropical Ocean University (Grant No. RHDRC202301).

摘要: We theoretically investigate the extended Bose-Hubbard model using a three-dimensional cubic lattice. In the framework of the dynamical Gutzwiller mean-field theory, we identify a checkerboard supersolid phase. By considering the repulsive interactions between next-nearest-neighbor lattice sites, we further discover an exotic type of supersolid state, whose site occupancies show a stereoscopically arrayed and staggered distribution rather than checkerboard ordering. Intriguingly, if the physical observations of two neighboring layers were superimposed, they would give rise to a checkerboard configuration. This novel structure is convincingly induced by the simultaneous existence of nearest-neighbor and next-nearest-neighbor interactions. We also identify arrayed stripes in the ground state, as well as arrayed holes in the pattern of occupancies.

关键词: supersolid, three-dimensional (3D) optical lattice, extended Bose-Hubbard, dynamical Gutzwiller theory

Abstract: We theoretically investigate the extended Bose-Hubbard model using a three-dimensional cubic lattice. In the framework of the dynamical Gutzwiller mean-field theory, we identify a checkerboard supersolid phase. By considering the repulsive interactions between next-nearest-neighbor lattice sites, we further discover an exotic type of supersolid state, whose site occupancies show a stereoscopically arrayed and staggered distribution rather than checkerboard ordering. Intriguingly, if the physical observations of two neighboring layers were superimposed, they would give rise to a checkerboard configuration. This novel structure is convincingly induced by the simultaneous existence of nearest-neighbor and next-nearest-neighbor interactions. We also identify arrayed stripes in the ground state, as well as arrayed holes in the pattern of occupancies.

Key words: supersolid, three-dimensional (3D) optical lattice, extended Bose-Hubbard, dynamical Gutzwiller theory

中图分类号:  (Multicomponent condensates; spinor condensates)

  • 03.75.Mn
03.75.Lm (Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations) 67.85.Fg (Multicomponent condensates; spinor condensates)