Nonequilibrium Landau-Zener tunneling in exciton-polariton condensates
文献类型：期刊论文
| 作者 | Xu, Xingran1,2,3; Zhang, Zhidong2,3; Liang, Zhaoxin1 |
| 刊名 | PHYSICAL REVIEW A
 |
| 出版日期 | 2020-09-11 |
| 卷号 | 102期号:3页码:10 |
| ISSN号 | 2469-9926 |
| DOI | 10.1103/PhysRevA.102.033317 |
| 通讯作者 | Liang, Zhaoxin(zhxliang@gmail.com) |
| 英文摘要 | For describing a coherent quantum two-level system driven by a linearly time-dependent energy separation of the diabatic states, the Landau-Zener model is routine to serve as a textbook model for its dynamics. Along this research line, a particularly intriguing question is whether the framework of Landau-Zener theory can be extended to an intrinsically nonequilibrium quantum system with coherent and dissipative dynamics occurring on an equal footing. In this work, we are motivated to investigate the Landau-Zener problem of polariton condensates in a periodic potential under nonresonant pumping by using the driven-dissipative Gross-Pitaevskii equations coupled to the rate equation. Within the two-mode approximation, a nonequilibrium Landau-Zener model, characterized by coherent and dissipative dynamics occurring on an equal footing, is derived. Fundamentally different from the previous Landau-Zener model, the total density of nonequilibrium Landau-Zener model, in general, is not the conserved quantity anymore due to the dissipative nature. In a surprise, the parameter regimes of the total density still being conserved can still be found. The motion of Hamiltonian of the nonequilibrium Landau-Zener problem in phase space is further discussed. The instability of the band structure can also be studied by the curvatures in phase space, and there may be two loops in the middle of the Brillouin zone. Detailed analysis of the nonequilibrium nature on the tunneling rate will open a new perspective toward understanding the Landau-Zener problem. |
| 资助项目 | National Natural Science Foundation of China[11604300] ; Key Projects of the Natural Science Foundation of China[11835011] ; NSFC of China[51331006] |
| WOS研究方向 | Optics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000571474900005 |
| 出版者 | AMER PHYSICAL SOC |
| 资助机构 | National Natural Science Foundation of China ; Key Projects of the Natural Science Foundation of China ; NSFC of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/140600]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Liang, Zhaoxin |
| 作者单位 | 1.Zhejiang Normal Univ, Dept Phys, Jinhua 321004, Zhejiang, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 3.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 | Xu, Xingran,Zhang, Zhidong,Liang, Zhaoxin. Nonequilibrium Landau-Zener tunneling in exciton-polariton condensates[J]. PHYSICAL REVIEW A,2020,102(3):10. |
| APA | Xu, Xingran,Zhang, Zhidong,&Liang, Zhaoxin.(2020).Nonequilibrium Landau-Zener tunneling in exciton-polariton condensates.PHYSICAL REVIEW A,102(3),10. |
| MLA | Xu, Xingran,et al."Nonequilibrium Landau-Zener tunneling in exciton-polariton condensates".PHYSICAL REVIEW A 102.3(2020):10. |
入库方式： OAI收割
来源：金属研究所
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