Quantum Magnetometer with Dual-Coupling Optomechanics
- URL: http://arxiv.org/abs/2205.00433v2
- Date: Thu, 15 Sep 2022 09:16:41 GMT
- Title: Quantum Magnetometer with Dual-Coupling Optomechanics
- Authors: Gui-Lei Zhu, Jing Liu, Ying Wu, and Xin-You L\"u
- Abstract summary: An experimentally feasible magnetometer based on a dual-coupling optomechanical system is proposed.
The sensitivity of a specific measurement can reach to the order of $10-17rm T/sqrtHz$ in the presence of dissipations.
- Score: 15.114575306125545
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: An experimentally feasible magnetometer based on a dual-coupling
optomechanical system is proposed, where the radiation-pressure coupling
transduces the magnetic signal to the optical phase, and the quadratic
optomechanical interaction induces a periodic squeezing effect. The latter not
only amplifies the signal to be measured, but also accelerates the signal
transducing rate characterized by an experimentally observable phase
accumulation efficiency. In the vicinity of opto-mechanical decoupled time, the
ultimate bound to the estimability of magnetic signal is proportional to
$\exp(-6r)$, and then the optimized accuracy of estimation can be enhanced
nearly 3 orders with a controllable squeezing parameter $r<1$. Moreover, our
proposal is robust against the mechanical thermal noise, and the sensitivity of
a specific measurement can reach to the order of $10^{-17}{\rm T/\sqrt{Hz}}$ in
the presence of dissipations and without ground state cooling of mechanical
oscillator. Our proposal fundamentally broadens the fields of quantum metrology
and cavity optomechanics, with potential application for on-chip magnetic
detection with high precision.
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