论文标题
两个全光量子记忆之间的相位锁定
Phase Locking between Two All-Optical Quantum Memories
论文作者
论文摘要
量子计算的光学方法需要以受控方式创建多模式光子量子状态。在这里，我们在实验中证明了两个全光量子记忆的相位锁定基于带有相参考光束的串联腔体系统，以实现两种模式纠缠的单光子状态的时间控制释放。可以独立确定每个模式的发布时间。生成的状态的特征是两型光学同伴断层扫描。纠缠和非经典性被保留为释放时间差异，最高为400 ns，分别通过对数负效率和Wigner-function否定性证实。
Optical approaches to quantum computation require the creation of multi-mode 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.
