%0 Journal Article %J Phys. Rev. A %D 2020 %T Back-action evading impulse measurement with mechanical quantum sensors %A Sohitri Ghosh %A Daniel Carney %A Peter Shawhan %A J. M. Taylor %X

The quantum measurement of any observable naturally leads to noise added by the act of measurement. Approaches to evade or reduce this noise can lead to substantial improvements in a wide variety of sensors, from laser interferometers to precision magnetometers and more. In this paper, we develop a measurement protocol based upon pioneering work by the gravitational wave community which allows for reduction of added noise from measurement by coupling an optical field to the momentum of a small mirror. As a specific implementation, we present a continuous measurement protocol using a double-ring optomechanical cavity. We demonstrate that with experimentally-relevant parameters, this protocol can lead to significant back-action noise evasion, yielding measurement noise below the standard quantum limit over many decades of frequency.

%B Phys. Rev. A %V 102 %8 8/28/2020 %G eng %U https://arxiv.org/pdf/1910.11892.pdf %N 023525 %9 FERMILAB-PUB-19-537-T %R https://doi.org/10.1103/PhysRevA.102.023525