| 腔场QED与量子点系统激子纠缠态的制备及消纠缠研究 |
| |
| 引用本文： | 向少华,施振刚,宋克慧. 腔场QED与量子点系统激子纠缠态的制备及消纠缠研究[J]. 量子光学学报, 2007, 13(3): 177-181 |
| |
| 作者姓名： | 向少华 施振刚 宋克慧 |
| |
| 作者单位： | 怀化学院物理与电子信息科学系,湖南,怀化,418008;怀化学院信息科学研究所,湖南,怀化,418008 |
| |
| 基金项目： | 湖南省自然科学基金，湖南省社会科学基金，湖南省高校青年骨干教师培养基金 |
| |
| 摘 要： | 利用量子点与单模腔场共振相互作用模型提出了激子Bell类和W类纠缠态的制备方案.借助于超算符方法和态的保真度考察了所制备的激子纠缠态的消相干特性,结果表明:激子Bell类和W态的纠缠特性非常脆弱,在极短的时间里演变为消纠缠态.基于腔场与两量子点共振相互作用模型设计了一个量子交换门.
|
| 关 键 词： | 激子纠缠态 腔场QED 量子交换门 消相干效应 |
| 文章编号： | 1007-6654（2007）03-0177-05 |
| 收稿时间： | 2005-12-26 |
| 修稿时间： | 2005-12-26 |
Preparation and Decoherence of Excitonic Entanglment in Coupled Quantum Dots and Cavity QED |
| |
| XIANG Shao-hua,SHI Zheng-gang,SONG Ke-hui. Preparation and Decoherence of Excitonic Entanglment in Coupled Quantum Dots and Cavity QED[J]. Acta Sinica Quantum Optica, 2007, 13(3): 177-181 |
| |
| Authors: | XIANG Shao-hua SHI Zheng-gang SONG Ke-hui |
| |
| Affiliation: | Department of Physics and Electronic Information Science, and Research Institute of Information Science, Huaihua University, Huaihua , 418008, China |
| |
| Abstract: | The paper proposes a scheme to generate such excitonic entanglement as that in Bell states and W-type states and implement quantum swap gate using a resonant single-mode cavity simultaneously interacting with many quantum dots.It also investigates the decoherence effect of the generated quantum states by means of fidelity and super-operator.It is shown that the generated quantum states are fragile and can become completely disentangled in a very short time. |
| |
| Keywords: | excitonic entanglement cavity QED swap gate decoherence effect |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
