Related papers: Critical parametric quantum sensing

Critical parametric quantum sensing

URL: http://arxiv.org/abs/2107.04503v3
Date: Wed, 29 Mar 2023 08:39:57 GMT
Title: Critical parametric quantum sensing
Authors: R. Di Candia, F. Minganti, K. V. Petrovnin, G. S. Paraoanu and S. Felicetti
Abstract summary: We assess the metrological power of parametric Kerr resonators undergoing driven-dissipative transitions. We show that the Heisenberg precision can be achieved with experimentally reachable parameters.
Score: 0.0
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
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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