Ruppert László, Rakhubovsky Andrey, Filip Radim
Department of Optics, Palacky University, 17. listopadu 12, 77 146, Olomouc, Czech Republic.
Sci Rep. 2022 Sep 26;12(1):16022. doi: 10.1038/s41598-022-20150-6.
A nanomechanical oscillator can be used as a sensitive probe of a small linearized mechanical force. We propose a simple quantum optomechanical scheme using a coherent light mode in the cavity and weak short-pulsed light-matter interactions. Our main result is that if we transfer some displacement to the mechanical mode in an initialization phase, then a much weaker optomechanical interaction is enough to obtain a high-precision multiparameter estimation of the unknown force. This approach includes not only estimating the displacement caused by the force but also simultaneously observing the phase shift and squeezing of the mechanical mode. We show that the proposed scheme is robust against typical experimental imperfections and demonstrate the feasibility of our scheme using orders of magnitude weaker optomechanical interactions than in previous related works. Thus, we present a simple, robust estimation scheme requiring only very weak light-matter interactions, which could open the way to new nanomechanical sensors.
纳米机械振荡器可作为微小线性化机械力的灵敏探测器。我们提出一种简单的量子光机械方案，该方案利用腔内的相干光模式以及微弱的短脉冲光与物质相互作用。我们的主要成果是，如果在初始化阶段将一些位移传递到机械模式，那么一个弱得多的光机械相互作用就足以获得对未知力的高精度多参数估计。这种方法不仅包括估计由力引起的位移，还同时观测机械模式的相移和压缩。我们表明，所提出的方案对典型的实验缺陷具有鲁棒性，并且证明了我们的方案在使用比以往相关工作弱几个数量级的光机械相互作用的情况下的可行性。因此，我们提出了一种仅需要非常微弱的光与物质相互作用的简单、鲁棒的估计方案，这可能为新型纳米机械传感器开辟道路。
