Optimal quantum parameter estimation in a pulsed quantum optomechanical system

TL;DR

This paper demonstrates that pulsed quantum optomechanical systems can significantly improve the precision of mechanical frequency estimation by leveraging quantum resources like mechanical squeezing induced by optical pulsed driving.

Contribution

It introduces a method to enhance quantum parameter estimation precision in optomechanical systems using pulsed optical driving and identifies mechanical squeezing as the key quantum resource.

Findings

Enhanced quantum Fisher information for mechanical frequency estimation.

Optical pulsed driving induces mechanical squeezing.

Mechanical squeezing improves estimation precision.

Abstract

We propose that a pulsed quantum optomechanical system can be applied for the problem of quantum parameter estimation, which targets to yield higher precision of parameter estimation utilizing quantum resource than that using classical methods. Mainly concentrating on the quantum Fisher information with respect to the mechanical frequency, we find that the corresponding precision of parameter estimation on the mechanical frequency can be enhanced by applying applicable optical resonant pulsed driving on the cavity of the optome- chanical system. Further investigation shows that the mechanical squeezing resulting from the optical pulsed driving is the quantum resource used in optimal quantum estimation on the frequency.