Quantum state measurement in double quantum dots with a radio-frequency quantum point contact
文献类型：期刊论文
| 作者 | Yan, L ; Wang, HX ; Yin, W ; Wang, FW |
| 刊名 | CHINESE PHYSICS B
 |
| 出版日期 | 2014 |
| 卷号 | 23期号:2 |
| 关键词 | measurement quantum state output voltage circuit parameter |
| ISSN号 | 1674-1056 |
| 通讯作者 | Yin, W (reprint author), Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | We study the dynamics of two electron spins in coupled quantum dots (CQDs) monitored by a quantum point contact (QPC) detector. Their quantum state can be measured by embedding the QPC in an LC circuit. We derive the Bloch-type rate equations of the reduced density matrix for CQDs. Special attention is paid to the numerical results for the weak measurement condintion under a strong Coulomb interaction. It is shown that the evolution of QPC current always follows that of electron occupation in the right dot. In addition, we find that the output voltage of the circuit can reflect the evolution of QPC current when the circuit and QPC are approximately equal in frequency. In particular, the wave shape of the output voltage can be improved by adjusting the circuit resonance frequency and bandwidth. |
| 资助信息 | National Natural Science Foundation of China [11174358]; National Basic Research Program of China [2010CB833102] |
| 语种 | 英语 |
| 公开日期 | 2015-04-14 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/59011]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Yan, L,Wang, HX,Yin, W,et al. Quantum state measurement in double quantum dots with a radio-frequency quantum point contact[J]. CHINESE PHYSICS B,2014,23(2). |
| APA | Yan, L,Wang, HX,Yin, W,&Wang, FW.(2014).Quantum state measurement in double quantum dots with a radio-frequency quantum point contact.CHINESE PHYSICS B,23(2). |
| MLA | Yan, L,et al."Quantum state measurement in double quantum dots with a radio-frequency quantum point contact".CHINESE PHYSICS B 23.2(2014). |
入库方式： OAI收割
来源：物理研究所
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