Projects per year
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.
Original language | English |
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Number of pages | 9 |
Journal | npj Quantum Information |
Volume | 9 |
DOIs | |
Publication status | Published - 14 Mar 2023 |
MoE publication type | A1 Journal article-refereed |
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-: Finnish Centre of Excellence in Quantum Technology
Paraoanu, G.-S. (Principal investigator)
01/01/2023 → 31/12/2025
Project: Academy of Finland: Other research funding
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QuantumMicrowave: Quantum communication and sensing with low-powered devices in the microwave regime
Di Candia, R. (Principal investigator)
01/09/2022 → 31/08/2027
Project: Academy of Finland: Other research funding
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QuantumMicrowave_research: Quantum communication and sensing with low-powered devices in the microwave regime
Di Candia, R. (Principal investigator)
01/09/2022 → 31/12/2025
Project: Academy of Finland: Other research funding