Quantum measurement of dynamic qubit information by a double quantum-dot detector
文献类型：期刊论文
| 作者 | Jiang, Zhao-Tan1; Yang, J.1; Han, Q. Z.2,3 |
| 刊名 | JOURNAL OF PHYSICS-CONDENSED MATTER
 |
| 出版日期 | 2008-02-20 |
| 卷号 | 20期号:7 |
| 关键词 | single-electron transistor operation spin |
| ISSN号 | 0953-8984 |
| 其他题名 | J. Phys.-Condes. Matter |
| 中文摘要 | In this paper we propose a novel measurement scheme, based on a double quantum-dot detector, for reading out the qubit information sensed by the detector as a variation of the interdot coupling. By investigating the detector in the static qubit case, we find a sensitive qubit-detector response region determined by the detector geometry. Then we study quantum measurement of the information stored in a dynamic qubit. It is verified that whether the detector can perform well is closely dependent on the ratio of the right dot-lead coupling to interdot coupling in the detector, while the interdot Coulomb interaction only plays a trivial role. Furthermore, it is shown that the dephasing time of the qubit is strongly influenced by the difference between the interdot couplings of the detector corresponding to two qubit states. This work provides some helpful instructions on how to devise an effective qubit detector. |
| 英文摘要 | In this paper we propose a novel measurement scheme, based on a double quantum-dot detector, for reading out the qubit information sensed by the detector as a variation of the interdot coupling. By investigating the detector in the static qubit case, we find a sensitive qubit-detector response region determined by the detector geometry. Then we study quantum measurement of the information stored in a dynamic qubit. It is verified that whether the detector can perform well is closely dependent on the ratio of the right dot-lead coupling to interdot coupling in the detector, while the interdot Coulomb interaction only plays a trivial role. Furthermore, it is shown that the dephasing time of the qubit is strongly influenced by the difference between the interdot couplings of the detector corresponding to two qubit states. This work provides some helpful instructions on how to devise an effective qubit detector. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Physics, Condensed Matter |
| 研究领域[WOS] | Physics |
| 关键词[WOS] | SINGLE-ELECTRON TRANSISTOR ; OPERATION ; SPIN |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000252927500024 |
| 公开日期 | 2013-10-08 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/2780]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Beijing Inst Technol, Dept Phys, Beijing 100081, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Multi Phase React Lab, Beijing 100080, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang, Zhao-Tan,Yang, J.,Han, Q. Z.. Quantum measurement of dynamic qubit information by a double quantum-dot detector[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2008,20(7). |
| APA | Jiang, Zhao-Tan,Yang, J.,&Han, Q. Z..(2008).Quantum measurement of dynamic qubit information by a double quantum-dot detector.JOURNAL OF PHYSICS-CONDENSED MATTER,20(7). |
| MLA | Jiang, Zhao-Tan,et al."Quantum measurement of dynamic qubit information by a double quantum-dot detector".JOURNAL OF PHYSICS-CONDENSED MATTER 20.7(2008). |
入库方式： OAI收割
来源：过程工程研究所
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。