Usefulness of quantum entanglement for enhancing precision in frequency estimation

Usefulness of quantum entanglement for enhancing precision in frequency estimation

We investigate strategies for reaching the ultimate limit on the precision of frequency estimation when the number of probes used in each run of the experiment is fixed. That limit is set by the quantum Cramér-Rao bound (QCRB), which predicts that the use of maximally entangled probes enhances the e...

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Bibliographic Details
Main Authors:	Marco A. Rodríguez-García, Ruynet L. de Matos Filho, Pablo Barberis-Blostein
Format:	Article
Language:	English
Published:	American Physical Society 2024-12-01
Series:	Physical Review Research
Online Access:	http://doi.org/10.1103/PhysRevResearch.6.043230
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