Single-outcome information gain of qubit measurements on different state ensembles
文献类型：期刊论文
| 作者 | Ren, XJ ; Fan, H |
| 刊名 | JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
 |
| 出版日期 | 2014 |
| 卷号 | 47期号:30 |
| 关键词 | information gain quantum measurement fidelity information-disturbance tradeoff |
| ISSN号 | 1751-8113 |
| 通讯作者 | Ren, XJ (reprint author), Henan Univ, Sch Phys & Elect, Kaifeng 475001, Peoples R China. |
| 中文摘要 | We calculate the single-outcome information gain of quantum measurements on a completely unknown qubit state randomly chosen from different state ensembles. It is shown that the information gain decreases when the ensemble size increases. We obtain analytic single-outcome information gain formulas for continuous equatorial and spherical state ensembles, which show that the states in the former ensemble are relatively easier to identify. The squared fidelity between post-measurement state and pre-measurement state is also calculated, and the qualitative tradeoff relations between information gain and fidelity are illustrated by our results. |
| 资助信息 | '973' program [2010CB922904]; NSFC [U1204114, 10974247, 11175248] |
| 语种 | 英语 |
| 公开日期 | 2015-04-14 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/59256]  |
| 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 | Ren, XJ,Fan, H. Single-outcome information gain of qubit measurements on different state ensembles[J]. JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL,2014,47(30). |
| APA | Ren, XJ,&Fan, H.(2014).Single-outcome information gain of qubit measurements on different state ensembles.JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL,47(30). |
| MLA | Ren, XJ,et al."Single-outcome information gain of qubit measurements on different state ensembles".JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL 47.30(2014). |
入库方式： OAI收割
来源：物理研究所
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