论文标题
轨道角动量多路复用连续变化状态的量子相干性
Quantum coherence of an orbital angular momentum multiplexed continuous-variable entangled state
论文作者
论文摘要
轨道角动量（OAM）多路复用状态是高维量子信息处理的重要量子资源。在本文中，我们通过实验量化了OAM多路复用连续变量（CV）纠缠状态的量子相干性，并在嘈杂的环境中表征了其演变。我们表明，携带拓扑费用的OAM多路复用的CV纠缠状态的量子相干性$ l = 1 $，$ L = 2 $与高斯模式的量子相同，在嘈杂的频道中，$ l = 0 $。此外，我们表明，即使观察到纠缠的突然死亡，OAM多路复用纠缠状态的量子相干性对噪声也很强。我们的结果提供了在嘈杂的环境中应用OAM多路复用CV纠缠状态的量子相干性的参考。
Orbital angular momentum (OAM) multiplexed entangled state is an important quantum resource for high dimensional quantum information processing. In this paper, we experimentally quantify quantum coherence of OAM multiplexed continuous-variable (CV) entangled state and characterize its evolution in a noisy environment. We show that the quantum coherence of the OAM multiplexed CV entangled state carrying topological charges $l=1$ and $l=2$ are the same as that of the Gaussian mode with $l=0$ in a noisy channel. Furthermore, we show that the quantum coherence of OAM multiplexed entangled state is robust to noise, even though the sudden death of entanglement is observed. Our results provide reference for applying quantum coherence of OAM multiplexed CV entangled state in a noisy environment.
