The ability to control the motion of mechanical systems through interaction with light has opened the door to a plethora of applications in fundamental and applied physics. With experiments routinely reaching the quantum regime, the focus has now turned towards creating and exploiting interesting non-classical states of motion and entanglement in optomechanical systems. Quantumness has also shifted from being the very reason why experiments are constructed to becoming a resource for the investigation of fundamental physics and the creation of quantum technologies. Here, by focusing on opto- and electromechanical platforms we review recent progress in quantum state preparation and entanglement of mechanical systems, together with applications to signal processing and transduction, quantum sensing and topological physics, as well as small-scale thermodynamics.

通过与光的相互作用来控制机械系统运动的能力为基础物理学和应用物理学中的大量应用打开了大门。随着实验经常达到量子状态，现在的重点已经转向创建和利用光机械系统中有趣的非经典运动和纠缠状态。量子性也已从构建实验的真正原因转变为研究基础物理学和创造量子技术的资源。在这里，通过关注光电和机电平台，我们回顾了机械系统的量子态制备和纠缠的最新进展，以及在信号处理和转导、量子传感和拓扑物理学中的应用，