Phase Locking between Two All-Optical Quantum Memories
Phase Locking between Two All-Optical Quantum Memories
复制标题
两个全光量子存储器之间的锁相
DOI：
10.1103/physrevlett.125.260508
复制
发表时间：
2020
影响因子：
8.6
通讯作者：
Furusawa Akira
中科院分区：
文献类型：
--
作者：
Okamoto Fumiya;Endo Mamoru;Matsuyama Mikihisa;Ishizuka Yuya;Liu Yang;Sakakibara Rei;Hashimoto Yosuke;Yoshikawa Jun-ichi;van Loock Peter;Furusawa Akira
量子计算的光学方法需要以受控的方式创建多模光子量子态。在这里，我们实验证明了两个全光量子存储器的相位锁定，基于级联腔系统与相位参考光束，时间控制释放的双模纠缠单光子态。每个模式的释放时间可以独立确定。所产生的状态的特征在于由双模光学零差层析。纠缠和非经典的保留释放时间的差异高达400纳秒，确认对数负和维格纳函数负，分别。
Optical approaches to quantum computation require the creation of multimode photonic quantum states in a controlled fashion. Here we experimentally demonstrate phase locking of two all-optical quantum memories, based on a concatenated cavity system with phase reference beams, for the time-controlled release of two-mode entangled single-photon states. The release time for each mode can be independently determined. The generated states are characterized by two-mode optical homodyne tomography. Entanglement and nonclassicality are preserved for release-time differences up to 400 ns, confirmed by logarithmic negativities and Wigner-function negativities, respectively.