Critical parametric quantum sensing

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Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2023-03-14
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Language
en
Pages
9
Series
npj Quantum Information, Volume 9
Abstract
Critical quantum systems are a promising resource for quantum metrology applications, due to the diverging susceptibility developed in proximity of phase transitions. Here, we assess the metrological power of parametric Kerr resonators undergoing driven-dissipative phase transitions. We fully characterize the quantum Fisher information for frequency estimation, and the Helstrom bound for frequency discrimination. By going beyond the asymptotic regime, we show that the Heisenberg precision can be achieved with experimentally reachable parameters. We design protocols that exploit the critical behavior of nonlinear resonators to enhance the precision of quantum magnetometers and the fidelity of superconducting qubit readout.
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| openaire: EC/H2020/891517/EU//Green-MIQUEC | openaire: EC/H2020/862644/EU//QUARTET
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Di Candia, R, Minganti, F, Petrovnin, K V, Paraoanu, G S & Felicetti, S 2023, ' Critical parametric quantum sensing ', npj Quantum Information, vol. 9 . https://doi.org/10.1038/s41534-023-00690-z