Ultracold Fermi gas in a single-mode cavity: Cavity-mediated interaction and BCS-BEC evolution
文献类型：期刊论文
| 作者 | Guo, Xiaoyong1; Ren, Zhongzhou1,2; Guo, Guangjie1; Peng, Jie1 |
| 刊名 | PHYSICAL REVIEW A
 |
| 出版日期 | 2012-11-07 |
| 卷号 | 86 |
| ISSN号 | 1050-2947 |
| DOI | 10.1103/PhysRevA.86.053605 |
| 文献子类 | Article |
| 英文摘要 | We propose that the evolution of superfluidity from the Bardeen-Cooper-Schrieffer (BCS) regime to the Bose-Einstein condensation (BEC) regime can be realized using ultracold Fermi gas coupled to a single-mode cavity. By the functional integral formalism, we derive an effective atom-only action, which mimics the two-component Fermi gas with tunable two-body interaction. First, we address the features of the cavity-mediated interaction. We find that the matter-light coupling creates an effective s-wave scattering whose sign and amplitude are controlled by parameters of the cavity. Second, we discuss the fermionic superfluidity on the mean-field level, including the order parameter, chemical potential, quasiparticle excitation spectrum, momentum distribution, and dissociation temperature. It is shown that by varying the atom-cavity detuning, a BCS to BEC crossover occurs. In addition, the influences of the atomic collaborative effect and external pumping field on the pairing correlation are also studied. |
| WOS关键词 | BOSE-EINSTEIN CONDENSATE ; PHASE-SEPARATION ; OPTICAL CAVITY ; CROSSOVER ; SUPERCONDUCTIVITY ; TRANSITION |
| 资助项目 | Research Fund of Doctoral Point (RFDP)[20100091110028] |
| WOS研究方向 | Optics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000310838600008 |
| 出版者 | AMER PHYSICAL SOC |
| 源URL | [http://119.78.100.186/handle/113462/49109]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Guo, Xiaoyong |
| 作者单位 | 1.Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China 2.Ctr Theoret Nucl Phys, Natl Lab Heavy Ion Accelerator, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Xiaoyong,Ren, Zhongzhou,Guo, Guangjie,et al. Ultracold Fermi gas in a single-mode cavity: Cavity-mediated interaction and BCS-BEC evolution[J]. PHYSICAL REVIEW A,2012,86. |
| APA | Guo, Xiaoyong,Ren, Zhongzhou,Guo, Guangjie,&Peng, Jie.(2012).Ultracold Fermi gas in a single-mode cavity: Cavity-mediated interaction and BCS-BEC evolution.PHYSICAL REVIEW A,86. |
| MLA | Guo, Xiaoyong,et al."Ultracold Fermi gas in a single-mode cavity: Cavity-mediated interaction and BCS-BEC evolution".PHYSICAL REVIEW A 86(2012). |
入库方式： OAI收割
来源：近代物理研究所
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。