TY - JOUR T1 - Back-action evading impulse measurement with mechanical quantum sensors JF - Phys. Rev. A Y1 - 2020 A1 - Sohitri Ghosh A1 - Daniel Carney A1 - Peter Shawhan A1 - J. M. Taylor AB -

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.

VL - 102 UR - https://arxiv.org/pdf/1910.11892.pdf CP - 023525 U5 - https://doi.org/10.1103/PhysRevA.102.023525 ER -