Quantum advantage of time-reversed ancilla-based metrology of open systems

J. Wang; J. Wang; R. L. de Matos Filho; G. S. Agarwal; G. S. Agarwal; G. S. Agarwal; L. Davidovich; L. Davidovich

doi:10.1364/FIO.2023.JTu5A.44

Frontiers in Optics + Laser Science 2023 (FiO, LS)
Technical Digest Series (Optica Publishing Group, 2023),
paper JTu5A.44
•https://doi.org/10.1364/FIO.2023.JTu5A.44

Quantum advantage of time-reversed ancilla-based metrology of open systems

J. Wang, R. L. de Matos Filho, G. S. Agarwal, and L. Davidovich

Frontiers in Optics 2023

Tacoma, Washington United States
9–12 October 2023
ISBN: 978-1-957171-29-6

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Joint Poster Session III (JTu5A)

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J. Wang, R. L. de Matos Filho, G. S. Agarwal, and L. Davidovich, "Quantum advantage of time-reversed ancilla-based metrology of open systems," in Frontiers in Optics + Laser Science 2023 (FiO, LS), Technical Digest Series (Optica Publishing Group, 2023), paper JTu5A.44.

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Abstract

We show that a bimodal squeezed state leads to optimal precision in the estimation of loss, overcoming challenges in producing and detecting high photon number Fock states. Using a time-reversal procedure provides a precise estimation that approaches the bound for weak absorption.

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