Quench dynamics of ultracold atoms in one-dimensional optical lattices with artificial gauge fields
文献类型：期刊论文
| 作者 | Cai, Xiaoming |
| 刊名 | CHINESE PHYSICS B
 |
| 出版日期 | 2017-08-01 |
| 卷号 | 26期号:8 |
| 关键词 | Nonequilibrium Dynamics 1d Optical Lattice Artificial Gauge Field Quasi-steady-state Current |
| DOI | 10.1088/1674-1056/26/8/086701 |
| 文献子类 | Article |
| 英文摘要 | We study the quench dynamics of noninteracting ultracold atoms loaded in one-dimensional (1D) optical lattices with artificial gauge fields, which are modeled by lattices with complex hopping coefficients. After suddenly changing the hopping coefficient, time evolutions of the density distribution, momentum distribution, and mass current at the center are studied for both finite uniform systems and trapped systems. Effects of filling factor, system size, statistics, harmonic trap, and phase difference in hopping are identified, and some interesting phenomena show up. For example, for a finite uniform fermionic system shock and rarefaction wave plateaus are formed at two ends, whose wave fronts move linearly with speed equaling to the maximal absolute group velocity. While for a finite uniform bosonic system the whole density distribution moves linearly at the group velocity. Only in a finite uniform fermionic system there can be a constant quasi-steady-state current, whose amplitude is decided by the phase difference and filling factor. The quench dynamics can be tested in ultracold atoms with minimal modifications of available experimental techniques, and it is a very interesting and fundamental example of the transport phenomena and the nonequilibrium dynamics. |
| WOS关键词 | MAGNETIC-FIELDS ; NEUTRAL ATOMS ; EQUILIBRIUM ; RELAXATION ; SYSTEM |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000407242100001 |
| 资助机构 | National Natural Science Foundation of China(11374331 ; National Natural Science Foundation of China(11374331 ; 11304364 ; 11304364 ; 11534014) ; 11534014) ; National Natural Science Foundation of China(11374331 ; National Natural Science Foundation of China(11374331 ; 11304364 ; 11304364 ; 11534014) ; 11534014) |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/11315]  |
| 专题 | 武汉物理与数学研究所_理论与交叉研究部 |
| 作者单位 | Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cai, Xiaoming. Quench dynamics of ultracold atoms in one-dimensional optical lattices with artificial gauge fields[J]. CHINESE PHYSICS B,2017,26(8). |
| APA | Cai, Xiaoming.(2017).Quench dynamics of ultracold atoms in one-dimensional optical lattices with artificial gauge fields.CHINESE PHYSICS B,26(8). |
| MLA | Cai, Xiaoming."Quench dynamics of ultracold atoms in one-dimensional optical lattices with artificial gauge fields".CHINESE PHYSICS B 26.8(2017). |
入库方式： OAI收割
来源：武汉物理与数学研究所
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