Ground-state competition of two-component bosons in an optical lattice near a Feshbach resonance
文献类型：期刊论文
| 作者 | Guo, LP ; Zhang, YB ; Chen, S |
| 刊名 | PHYSICAL REVIEW A
 |
| 出版日期 | 2007 |
| 卷号 | 75期号:1 |
| ISSN号 | 1050-2947 |
| 关键词 | TRANSITION SUPERFLUID INSULATOR ATOMS |
| 通讯作者 | Chen, S: Shanxi Univ, Dept Phys, Taiyuan 030006, Peoples R China. |
| 中文摘要 | We investigate the ground-state properties of an equal mixture of two species of bosons in its Mott-insulator phase at a filling factor of two per site. We identify one type of spin triplet-singlet transition through the competition of the ground state. When the on-site interaction is weak (U < U-c) the two particles prefer to stay in the lowest band and with weak tunneling between neighboring sites the system is mapped into an effective spin-1 ferromagnetic exchange Hamiltonian. When the interaction is tuned by a Feshbach resonance to be large enough (U < U-c), the higher band will be populated. Due to the orbital coupling term S+S- in the Hamiltonian, the two atoms in different orbits on a site would form an on-site singlet. For a non-SU(2)-symmetric model, easy-axis or easy-plane ferromagnetic spin exchange models may be realized, corresponding to phase separation or counterflow superfluidity, respectively. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/38854]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Guo, LP,Zhang, YB,Chen, S. Ground-state competition of two-component bosons in an optical lattice near a Feshbach resonance[J]. PHYSICAL REVIEW A,2007,75(1). |
| APA | Guo, LP,Zhang, YB,&Chen, S.(2007).Ground-state competition of two-component bosons in an optical lattice near a Feshbach resonance.PHYSICAL REVIEW A,75(1). |
| MLA | Guo, LP,et al."Ground-state competition of two-component bosons in an optical lattice near a Feshbach resonance".PHYSICAL REVIEW A 75.1(2007). |
入库方式： OAI收割
来源：物理研究所
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