Liu Shengshuai, Lou Yanbo, Jing Jietai
Opt Express. 2021 Nov 22;29(24):38971-38978. doi: 10.1364/OE.439375.
The phase manipulation of the two-mode entangled state, which can flexibly control the combination of quadrature components on demand, is important for continuous variable (CV) quantum information and quantum metrology. Here, we experimentally demonstrate the phase manipulation of entangled state by using a phase-sensitive amplifier (PSA) based on four-wave mixing (FWM) process. The entanglement with different phase space squeezing orientations can be generated by directly changing the phase of the PSA. Our scheme is concise and can be expanded to generate multi-parties entangled states on demand. Our results here pave the way to realize a phase-coded quantum key distribution protocol and squeezing-enhanced Raman spectroscopy.
双模纠缠态的相位操控对于连续变量（CV）量子信息和量子计量学至关重要，它能够按需灵活控制正交分量的组合。在此，我们通过使用基于四波混频（FWM）过程的相位敏感放大器（PSA），实验演示了纠缠态的相位操控。通过直接改变PSA的相位，可以产生具有不同相空间压缩取向的纠缠态。我们的方案简洁，并且可以扩展以按需生成多方纠缠态。我们在此的结果为实现相位编码量子密钥分发协议和压缩增强拉曼光谱铺平了道路。
