论文标题
朝着冷原子中轨道角动量量子矩阵有效的量子记忆
Towards efficient quantum memory of orbital angular momentum qubits in cold atoms
论文作者
论文摘要
带有量化数量的轨道角动量（OAM）的光的空间模式是提供高维量子状态的出色候选者之一，这实质上使其有望建立高维量子网络。在本文中，我们报告了在冷原子合奏中用OAM状态编码的光子Qubits的存储和检索，达到了98％以上的平均条件保真度，并且检索效率约为65％。光子OAM量子位在单光子水平上用弱相干状态编码，并且记忆基于细长的冷rubium atomic集合中电磁诱导的透明度。我们的工作构成了一个有效的节点，该节点需要用于高维和大规模量子网络。
The spatial modes of light, carrying a quantized amount of orbital angular momentum (OAM), is one of the excellent candidates that provides access to high-dimensional quantum states, which essentially makes it promising towards building high-dimensional quantum networks. In this paper, we report the storage and retrieval of photonic qubits encoded with OAM state in the cold atomic ensemble, achieving an average conditional fidelity above 98% and retrieval efficiency around 65%. The photonic OAM qubits are encoded with weak coherent states at the single-photon level and the memory is based on electromagnetically induced transparency in an elongated cold rubidium atomic ensemble. Our work constitutes an efficient node that is needed towards high dimensional and large scale quantum networks.
