Quantum metrology and estimation of Unruh effect
文献类型：期刊论文
| 作者 | Wang, JC ; Tian, ZH ; Jing, JL ; Fan, H |
| 刊名 | SCIENTIFIC REPORTS
 |
| 出版日期 | 2014 |
| 卷号 | 4 |
| ISSN号 | 2045-2322 |
| 通讯作者 | Wang, JC (reprint author), Hunan Normal Univ, Dept Phys, Changsha 410081, Hunan, Peoples R China. |
| 中文摘要 | We study the quantum metrology for a pair of entangled Unruh-Dewitt detectors when one of them is accelerated and coupled to a massless scalar field. Comparing with previous schemes, our model requires only local interaction and avoids the use of cavities in the probe state preparation process. We show that the probe state preparation and the interaction between the accelerated detector and the external field have significant effects on the value of quantum Fisher information, correspondingly pose variable ultimate limit of precision in the estimation of Unruh effect. We find that the precision of the estimation can be improved by a larger effective coupling strength and a longer interaction time. Alternatively, the energy gap of the detector has a range that can provide us a better precision. Thus we may adjust those parameters and attain a higher precision in the estimation. We also find that an extremely high acceleration is not required in the quantum metrology process. |
| 资助信息 | 973 program [2010CB922904]; National Natural Science Foundation of China [11305058, 11175248, 11475061]; Doctoral Scientific Fund Project of the Ministry of Education of China [20134306120003]; Postdoctoral Science Foundation of China [2014M560129] |
| 语种 | 英语 |
| 公开日期 | 2015-04-14 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/59681]  |
| 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 | Wang, JC,Tian, ZH,Jing, JL,et al. Quantum metrology and estimation of Unruh effect[J]. SCIENTIFIC REPORTS,2014,4. |
| APA | Wang, JC,Tian, ZH,Jing, JL,&Fan, H.(2014).Quantum metrology and estimation of Unruh effect.SCIENTIFIC REPORTS,4. |
| MLA | Wang, JC,et al."Quantum metrology and estimation of Unruh effect".SCIENTIFIC REPORTS 4(2014). |
入库方式： OAI收割
来源：物理研究所
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