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Proposed robust entanglement-based magnetic field sensor beyond the standard quantum limit

journal contribution
posted on 2023-06-08, 23:11 authored by Tohru Tanaka, Paul Knott, Yuichiro Matsuzaki, Shane Dooley, Hiroshi Yamaguchi, William J Munro, Shiro Saito
Recently, there have been significant developments in entanglement-based quantum metrology. However, entanglement is fragile against experimental imperfections, and quantum sensing to beat the standard quantum limit in scaling has not yet been achieved in realistic systems. Here, we show that it is possible to overcome such restrictions so that one can sense a magnetic field with an accuracy beyond the standard quantum limit even under the effect of decoherence, by using a realistic entangled state that can be easily created even with current technology. Our scheme could pave the way for the realizations of practical entanglement-based magnetic field sensors.

History

Publication status

  • Published

Journal

Physical Review Letters

ISSN

0031-9007

Publisher

American Physical Society

Issue

17

Volume

115

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2015-11-13

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