Lower bound for the hyperfine populations of spin-2 condensates against a magnetic field under the single-spatial-mode approximation
文献类型：期刊论文
| 作者 | Liu, YM; He, YZ; Bao, CG |
| 刊名 | PHYSICAL REVIEW A
 |
| 出版日期 | 2015 |
| 卷号 | 92期号:6页码:63631 |
| 通讯作者 | Bao, CG (reprint author), Sun Yat Sen Univ, Sch Phys & Engn, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China. |
| 英文摘要 | The variation of the hyperfine populations N rho(mu) of the ground state (g.s.) of spin-2 condensates against a magnetic field B is studied. A N-body theory which is rigorous in dealing with the spin degrees of freedom has been adopted. The conservation of the total magnetization M is assumed. A combined hyperfine population N rho(comb) = N(rho(0) - 3 rho(2) - 3 rho(-2)), which is an observable, is defined. The lower bound for this population has been derived analytically. It turns out that the lower bound is identical to the actual population when B = 0 and 8, and the population is monotonically uprising in between. Thus, via the analytical form of the lower bound, the variation of the population against B can be roughly known in advance. Numerical examples are given to demonstrate the applicability of the bound. When M = 0, the g.s. in the polar phase was found to be highly unstable against B because the neighboring level density is extremely high. When M = N, the g.s. in the cyclic phase was also found to be highly unstable. This is because the appearance of B, even if it is very weak, will break the high degeneracy of the g.s. and result in having numerous levels emerging in the neighborhood of the g.s. |
| 学科主题 | Optics ; Physics |
| 类目[WOS] | Optics ; Physics, Atomic, Molecular & Chemical |
| 关键词[WOS] | GROUND-STATE ; BOSE ; DYNAMICS ; GASES |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/20737]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 推荐引用方式 GB/T 7714 | Liu, YM,He, YZ,Bao, CG. Lower bound for the hyperfine populations of spin-2 condensates against a magnetic field under the single-spatial-mode approximation[J]. PHYSICAL REVIEW A,2015,92(6):63631. |
| APA | Liu, YM,He, YZ,&Bao, CG.(2015).Lower bound for the hyperfine populations of spin-2 condensates against a magnetic field under the single-spatial-mode approximation.PHYSICAL REVIEW A,92(6),63631. |
| MLA | Liu, YM,et al."Lower bound for the hyperfine populations of spin-2 condensates against a magnetic field under the single-spatial-mode approximation".PHYSICAL REVIEW A 92.6(2015):63631. |
入库方式： OAI收割
来源：理论物理研究所
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