论文标题
宏观量子测试，散装声波谐振器
Macroscopic quantum test with bulk acoustic wave resonators
论文作者
论文摘要
最近，固态机械谐振器已成为展示涉及真正宏观数量颗粒的系统的非经典行为的平台。在这里，我们在迄今为止的机械谐振器中执行最宏观的量子测试，该试验探测了微克质量尺度上量子力学的有效性。这是通过直接测量高过时的散装声波谐振器模式的Wigner函数来完成的，从而监测了在数十微秒内的消极衰减的逐渐衰减。虽然获得的宏观尺寸为$μ= 11.3 $与最新的原子干涉仪相当，但模式几何和相干时间的未来改进可以证实在前所未有的尺度上的量子叠加原理。
Recently, solid-state mechanical resonators have become a platform for demonstrating non-classical behavior of systems involving a truly macroscopic number of particles. Here, we perform the most macroscopic quantum test in a mechanical resonator to date, which probes the validity of quantum mechanics at the microgram mass scale. This is done by a direct measurement of the Wigner function of a high-overtone bulk acoustic wave resonator mode, monitoring the gradual decay of negativities over tens of microseconds. While the obtained macroscopicity of $μ= 11.3$ is on par with state-of-the-art atom interferometers, future improvements of mode geometry and coherence times could confirm the quantum superposition principle at unprecedented scales.
