Evolution of the vortex state in the BCS-BEC crossover of a quasi two-dimensional superfluid Fermi gas
文献类型：期刊论文
| 作者 | Luo, Xuebing; Zhou, Kezhao; Zhang, Zhidong |
| 刊名 | CHINESE PHYSICS B
 |
| 出版日期 | 2016-11-01 |
| 卷号 | 25期号:11页码:5 |
| 关键词 | ultra-cold quantum gases superconductivity/superfluidity vortex BCS-BEC crossover |
| ISSN号 | 1674-1056 |
| DOI | 10.1088/1674-1056/25/11/110306 |
| 通讯作者 | Zhou, Kezhao(kezhaozhou@gmail.com) |
| 英文摘要 | We use the path-integral formalism to investigate the vortex properties of a quasi-two dimensional (2D) Fermi superfluid system trapped in an optical lattice potential. Within the framework of mean-field theory, the cooper pair density, the atom number density, and the vortex core size are calculated from weakly interacting BCS regime to strongly coupled while weakly interacting BEC regime. Numerical results show that the atoms gradually penetrate into the vortex core as the system evolves from BEC to BCS regime. Meanwhile, the presence of the optical lattice allows us to analyze the vortex properties in the crossover from three-dimensional (3D) to 2D case. Furthermore, using a simple re-normalization procedure, we find that the two-body bound state exists only when the interaction is stronger than a critical one denoted by G(c) which is obtained as a function of the lattice potential's parameter. Finally, we investigate the vortex core size and find that it grows with increasing interaction strength. In particular, by analyzing the behavior of the vortex core size in both BCS and BEC regimes, we find that the vortex core size behaves quite differently for positive and negative chemical potentials. |
| 资助项目 | National Natural Science Foundation of China[51331006] ; National Natural Science Foundation of China[51590883] ; National Natural Science Foundation of China[11204321] ; Project of Chinese Academy of Sciences[KJZD-EW-M05-3] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000390376900007 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | National Natural Science Foundation of China ; Project of Chinese Academy of Sciences |
| 源URL | [http://ir.imr.ac.cn/handle/321006/123509]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Zhou, Kezhao |
| 作者单位 | Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Luo, Xuebing,Zhou, Kezhao,Zhang, Zhidong. Evolution of the vortex state in the BCS-BEC crossover of a quasi two-dimensional superfluid Fermi gas[J]. CHINESE PHYSICS B,2016,25(11):5. |
| APA | Luo, Xuebing,Zhou, Kezhao,&Zhang, Zhidong.(2016).Evolution of the vortex state in the BCS-BEC crossover of a quasi two-dimensional superfluid Fermi gas.CHINESE PHYSICS B,25(11),5. |
| MLA | Luo, Xuebing,et al."Evolution of the vortex state in the BCS-BEC crossover of a quasi two-dimensional superfluid Fermi gas".CHINESE PHYSICS B 25.11(2016):5. |
入库方式： OAI收割
来源：金属研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。