论文标题
在其运动基态附近的超晶体膜谐振器的声子计数调节体
Phonon counting thermometry of an ultracoherent membrane resonator near its motional ground state
论文作者
论文摘要
宏观机械对象的非高斯量子状态的产生是量子信息科学中许多挑战的关键，从基本的变形测试到量子通信和传感。预示着单次机械运动状态的一代是实现这一目标的有吸引力的方式，因为它原则上不受物体大小的限制。在这里，我们演示了一种技术，该技术允许通过声子计数测量值在1.5 MHz微机械振荡器的基态附近生成和检测量子状态。我们使用超鼻翼光学滤光片从中间的膜中检测到中膜的光子，并在运动接地状态附近执行拉曼（Raman-Ratio）温度测定法和二阶强度干涉仪（$ \ bar {n} = 0.23 \ pm0.02 $ phonons）。在纳米图范围内有效质量，我们的系统将自己提供了迄今为止一些最重的物体的长寿非高斯运动状态的研究。
Generation of non-Gaussian quantum states of macroscopic mechanical objects is key to a number of challenges in quantum information science, ranging from fundamental tests of decoherence to quantum communication and sensing. Heralded generation of single-phonon states of mechanical motion is an attractive way towards this goal, as it is, in principle, not limited by the object size. Here we demonstrate a technique which allows for generation and detection of a quantum state of motion by phonon counting measurements near the ground state of a 1.5 MHz micromechanical oscillator. We detect scattered photons from a membrane-in-the-middle optomechanical system using an ultra-narrowband optical filter, and perform Raman-ratio thermometry and second-order intensity interferometry near the motional ground state ($\bar{n}=0.23\pm0.02$ phonons). With an effective mass in the nanogram range, our system lends itself for studies of long-lived non-Gaussian motional states with some of the heaviest objects to date.
