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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 College of Science, Hainan Tropical Ocean University, Sanya 572022, China;
2 Department of Physics, Beijing Normal University, Beijing 100875, China |
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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.
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Received: 01 February 2025
Revised: 09 April 2025
Accepted manuscript online: 24 April 2025
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PACS:
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03.75.Mn
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(Multicomponent condensates; spinor condensates)
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03.75.Lm
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(Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)
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67.85.Fg
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(Multicomponent condensates; spinor condensates)
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| Fund: 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). |
Corresponding Authors:
Dian-Cheng Zhang
E-mail: zhangdiancheng16@mails.ucas.ac.cn
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Cite this article:
Dian-Cheng Zhang(张典承) and Shi-Jie Yang(杨师杰) Interacting bosons in a three-dimensional lattice 2025 Chin. Phys. B 34 080304
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