Weak measurement of qubit oscillations with strong response detectors: violation of the fundamental bound imposed on linear detectors
文献类型：期刊论文
| 作者 | Jiao, HuJun1; Li, Feng1; Wang, Shi-Kuan2; Li, Xin-Qi1,3 |
| 刊名 | Physical review b
 |
| 出版日期 | 2009-02-01 |
| 卷号 | 79期号:7页码:5 |
| 关键词 | Mesoscopic systems Photodetectors Quantum computing Single electron transistors |
| ISSN号 | 1098-0121 |
| DOI | 10.1103/physrevb.79.075320 |
| 通讯作者 | Jiao, hujun() |
| 英文摘要 | Qubit measurement by mesoscopic charge detectors has received great interest in the community of mesoscopic transport and solid-state quantum computation, and some controversial issues still remain unresolved. in this work, we revisit the continuous weak measurement of a solid-state qubit by single electron transistors (sets) in nonlinear-response regime. for two set models typically used in the literature, we find that the signal-to-noise ratio can violate the universal upper bound "4," which is imposed quantum mechanically on linear-response detectors. this different result can be understood by means of the cross correlation of the detector currents by viewing the two junctions of the single set as two detectors. possible limitation of the potential-scattering approach to this result is also discussed. |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Condensed Matter |
| 语种 | 英语 |
| WOS记录号 | WOS:000263815800076 |
| 出版者 | AMER PHYSICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2427564 |
| 专题 | 半导体研究所 |
| 通讯作者 | Jiao, HuJun |
| 作者单位 | 1.Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, Beijing 100083, Peoples R China 2.Beijing Normal Univ, Dept Chem, Beijing 100875, Peoples R China 3.Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiao, HuJun,Li, Feng,Wang, Shi-Kuan,et al. Weak measurement of qubit oscillations with strong response detectors: violation of the fundamental bound imposed on linear detectors[J]. Physical review b,2009,79(7):5. |
| APA | Jiao, HuJun,Li, Feng,Wang, Shi-Kuan,&Li, Xin-Qi.(2009).Weak measurement of qubit oscillations with strong response detectors: violation of the fundamental bound imposed on linear detectors.Physical review b,79(7),5. |
| MLA | Jiao, HuJun,et al."Weak measurement of qubit oscillations with strong response detectors: violation of the fundamental bound imposed on linear detectors".Physical review b 79.7(2009):5. |
入库方式： iSwitch采集
来源：半导体研究所
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。