Efficient computation of the Nagaoka—Hayashi bound for multi-parameter estimation with separable measurements

Lorcan O. Conlon; Jun Suzuki; Ping Koy Lam; Ping Koy Lam; Syed M. Assad; Syed M. Assad

doi:10.1364/QIM.2021.W2A.2

Quantum Information and Measurement VI 2021
Technical Digest Series (Optica Publishing Group, 2021),
paper W2A.2
•https://doi.org/10.1364/QIM.2021.W2A.2

Efficient computation of the Nagaoka—Hayashi bound for multi-parameter estimation with separable measurements

Lorcan O. Conlon, Jun Suzuki, Ping Koy Lam, and Syed M. Assad

Quantum Information and Measurement 2021

Washington, DC United States
1–5 November 2021
ISBN: 978-1-957171-01-2

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Precision Measurements and Quantum Metrology II (W2A)

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L. O. Conlon, J. Suzuki, P. K. Lam, and S. M. Assad, "Efficient computation of the Nagaoka—Hayashi bound for multi-parameter estimation with separable measurements," in Quantum Information and Measurement VI 2021, F. Sciarrino, N. Treps, M. Giustina, and C. Silberhorn, eds., Technical Digest Series (Optica Publishing Group, 2021), paper W2A.2.

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Abstract

We introduce a tight bound for quantum metrology for estimating multiple parameters simulta-neously when performing separable measurements; relevant for experimental accessibility. We show that this bound can be efficiently computed as a semidefinite program.

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