Quantum advantage in postselected metrology

David R. M. Arvidsson-Shukur; Nicole Yunger Halpern; Hugo V. Lepage; Aleksander A. Lasek; Crispin H. W. Barnes; Seth Lloyd

doi:10.1038/s41467-020-17559-w

Nature Communications (Jul 2020)

Quantum advantage in postselected metrology

David R. M. Arvidsson-Shukur,
Nicole Yunger Halpern,
Hugo V. Lepage,
Aleksander A. Lasek,
Crispin H. W. Barnes,
Seth Lloyd

Affiliations

David R. M. Arvidsson-Shukur: Cavendish Laboratory, Department of Physics, University of Cambridge
Nicole Yunger Halpern: Research Laboratory of Electronics, Massachusetts Institute of Technology
Hugo V. Lepage: Cavendish Laboratory, Department of Physics, University of Cambridge
Aleksander A. Lasek: Cavendish Laboratory, Department of Physics, University of Cambridge
Crispin H. W. Barnes: Cavendish Laboratory, Department of Physics, University of Cambridge
Seth Lloyd: Department of Mechanical Engineering, Massachusetts Institute of Technology

DOI: https://doi.org/10.1038/s41467-020-17559-w
Journal volume & issue: Vol. 11, no. 1
pp. 1 – 7

Abstract

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In quantum metrology (as well as computing) it is not easy to pinpoint the specific source of quantum advantage. Here, the authors reveal a link between postselection and the unusually high rates of information per final measurement in general quantum parameter-estimation scenarios.

Published in Nature Communications

ISSN: 2041-1723 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Science
Website: https://www.nature.com/ncomms/

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