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DOI | 10.1038/s41467-018-02991-w |
Fundamental limits and non-reciprocal approaches in non-Hermitian quantum sensing | |
Lau, Hoi-Kwan; Clerk, Aashish A. | |
2018-10-17 | |
发表期刊 | NATURE COMMUNICATIONS
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ISSN | 2041-1723 |
出版年 | 2018 |
卷号 | 9 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Unconventional properties of non-Hermitian systems, such as the existence of exceptional points, have recently been suggested as a resource for sensing. The impact of noise and utility in quantum regimes however remains unclear. In this work, we analyze the parametric-sensing properties of linear coupled-mode systems that are described by effective non-Hermitian Hamiltonians. Our analysis fully accounts for noise effects in both classical and quantum regimes, and also fully treats a realistic and optimal measurement protocol based on coherent driving and homodyne detection. Focusing on two-mode devices, we derive fundamental bounds on the signal power and signal-to-noise ratio for any such sensor. We use these to demonstrate that enhanced signal power requires gain, but not necessarily any proximity to an exceptional point. Further, when noise is included, we show that non-reciprocity is a powerful resource for sensing: it allows one to exceed the fundamental bounds constraining any conventional, reciprocal sensor. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000447509700002 |
WOS关键词 | EXCEPTIONAL POINTS ; STATISTICAL DISTANCE ; NON-RECIPROCITY ; CAVITY ; SHIFT ; MICROCAVITY ; STATES ; MODES ; NOISE ; LIGHT |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/203653 |
专题 | 资源环境科学 |
作者单位 | Univ Chicago, Inst Mol Engn, 5640 South Ellis Ave, Chicago, IL 60637 USA |
推荐引用方式 GB/T 7714 | Lau, Hoi-Kwan,Clerk, Aashish A.. Fundamental limits and non-reciprocal approaches in non-Hermitian quantum sensing[J]. NATURE COMMUNICATIONS,2018,9. |
APA | Lau, Hoi-Kwan,&Clerk, Aashish A..(2018).Fundamental limits and non-reciprocal approaches in non-Hermitian quantum sensing.NATURE COMMUNICATIONS,9. |
MLA | Lau, Hoi-Kwan,et al."Fundamental limits and non-reciprocal approaches in non-Hermitian quantum sensing".NATURE COMMUNICATIONS 9(2018). |
条目包含的文件 | 条目无相关文件。 |
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