Single-photon quantum regime of artificial radiation pressure on a surface acoustic wave resonator
Single-photon quantum regime of artificial radiation pressure on a surface acoustic wave resonator
复制标题
DOI：
10.1038/s41467-020-14910-z
复制
发表时间：
2020-03-17
影响因子：
16.6
通讯作者：
Nakamura, Yasunobu
中科院分区：
文献类型：
--
作者：
Noguchi, Atsushi;Yamazaki, Rekishu;Nakamura, Yasunobu
电磁场携带动量，动量在物质上反射时产生光子的辐射压力。近年来，辐射压力已被用于腔光学力学中，用于在量子极限下控制宏观物体的机械运动。然而，由于相互作用的弱点，迄今为止的尝试不得不使用强相干驱动来达到量子极限。因此，单光子量子机制是腔光学力学的下一个里程碑之一，即使存在完全非共振的单光子也会显着改变力学模式的量子态。在这里，我们演示了一个人工实现的微波光子的辐射压力作用于声子在表面声波谐振器。相互作用强度的数量级增强起源于超导约瑟夫森结电路的良好定制的、强的、二阶非线性。合成辐射压力相互作用为量子光力学工具箱增加了一个关键元素，可以应用于电磁和力学自由度之间的量子信息接口。
Electromagnetic fields carry momentum, which upon reflection on matter gives rise to the radiation pressure of photons. The radiation pressure has recently been utilized in cavity optomechanics for controlling mechanical motions of macroscopic objects at the quantum limit. However, because of the weakness of the interaction, attempts so far had to use a strong coherent drive to reach the quantum limit. Therefore, the single-photon quantum regime, where even the presence of a totally off-resonant single photon alters the quantum state of the mechanical mode significantly, is one of the next milestones in cavity optomechanics. Here we demonstrate an artificial realization of the radiation pressure of microwave photons acting on phonons in a surface acoustic wave resonator. The order-of-magnitude enhancement of the interaction strength originates in the well-tailored, strong, second-order nonlinearity of a superconducting Josephson junction circuit. The synthetic radiation pressure interaction adds a key element to the quantum optomechanical toolbox and can be applied to quantum information interfaces between electromagnetic and mechanical degrees of freedom.