Department of Physics, Princeton University, Princeton, New Jersey 08544, USA.
Phys Rev Lett. 2018 Jun 1;120(22):227702. doi: 10.1103/PhysRevLett.120.227702.
We realize a superconducting circuit analog of the generic cavity-optomechanical Hamiltonian by longitudinally coupling two superconducting resonators, which are an order of magnitude different in frequency. We achieve longitudinal coupling by embedding a superconducting quantum interference device into a high frequency resonator, making its resonance frequency depend on the zero point current fluctuations of a nearby low frequency LC resonator. By applying sideband drive fields we enhance the intrinsic coupling strength of about 15 kHz up to 280 kHz by controlling the amplitude of the drive field. Our results pave the way towards the exploration of optomechanical effects in a fully superconducting platform and could enable quantum optics experiments with photons in the yet unexplored radio frequency band.
我们通过纵向耦合两个频率相差一个数量级的超导谐振器，实现了通用腔光机械哈密顿量的超导电路模拟。我们通过将超导量子干涉器件嵌入到高频谐振器中，实现了纵向耦合，使其共振频率取决于附近低频 LC 谐振器的零点电流波动。通过施加边带驱动场，我们通过控制驱动场的幅度，将约 15 kHz 的固有耦合强度增强到 280 kHz。我们的研究结果为在全超导平台上探索光机械效应铺平了道路，并可能使光子在尚未探索的射频波段的量子光学实验成为可能。
