Heisenberg-Limited Metrology via Weak-Value Amplification without Using Entangled Resources
SCIE
SCOPUS
- Title
- Heisenberg-Limited Metrology via Weak-Value Amplification without Using Entangled Resources
- Authors
- Kim, Yosep; Yoo, Seung-Yeun; Kim, Yoon-Ho
- Date Issued
- 2022-01
- Publisher
- American Physical Society
- Abstract
- © 2022 American Physical SocietyWeak-value amplification (WVA) provides a way for amplified detection of a tiny physical signal at the expense of a lower detection probability. Despite this trade-off, due to its robustness against certain types of noise, WVA has advantages over conventional measurements in precision metrology. Moreover, it has been shown that WVA-based metrology can reach the Heisenberg limit using entangled resources, but preparing macroscopic entangled resources remains challenging. Here, we demonstrate a novel WVA scheme based on iterative interactions, achieving the Heisenberg-limited precision scaling without resorting to entanglement. This indicates that the perceived advantages of the entanglement-assisted WVA are in fact due to iterative interactions between each particle of an entangled system and a meter, rather than coming from the entanglement itself. Our work opens a practical pathway for achieving the Heisenberg-limited WVA without using fragile and experimentally demanding entangled resources.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/110639
- DOI
- 10.1103/PhysRevLett.128.040503
- ISSN
- 0031-9007
- Article Type
- Article
- Citation
- Physical Review Letters, vol. 128, no. 4, 2022-01
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- There are no files associated with this item.
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