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Quantum estimation of coupling strengths in driven-dissipative optomechanics

Sala, Kamila; Doicin, Tib; Armour, Andrew D.; Tufarelli, Tommaso

Quantum estimation of coupling strengths in driven-dissipative optomechanics Thumbnail


Kamila Sala

Tib Doicin


We exploit local quantum estimation theory to investigate the measurement of linear (g1) and quadratic (g2) coupling strengths in a driven-dissipative optomechanical system in the red-sideband regime. We consider model parameters inspired by recent experiments, in the regime g2 < g1. We find that: (i) g1 is easier to estimate than g2 at lower driving strengths, while (ii) strong enough driving allows the two parameters to be estimated with similar relative precision. Our analysis also reveals that the majority of information about g1 and g2 is encoded in the reduced state of the mechanical element, and that the best estimation strategy for both coupling parameters is well approximated by a direct measurement of the mechanical position quadrature. Interestingly, we also show that temperature does not always have a detrimental effect on the estimation precision.

Journal Article Type Article
Acceptance Date Jul 6, 2021
Online Publication Date Sep 7, 2021
Publication Date Sep 1, 2021
Deposit Date Aug 4, 2021
Publicly Available Date Sep 1, 2021
Journal Physical Review A
Print ISSN 2469-9926
Electronic ISSN 2469-9934
Peer Reviewed Peer Reviewed
Volume 104
Issue 3
Article Number 033508
Public URL
Publisher URL


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