论文标题
腔体增强量子网络节点
Cavity-enhanced quantum network nodes
论文作者
论文摘要
未来的量子网络将由由量子通道连接的量子处理器组成，就像传统计算机被连接到形成互联网一样。然而，与经典设备相反，量子控制系统中可用的纠缠和非本地相关性促进了量子理论的新基本测试。此外，它们可以在分布式量子信息处理，量子通信和精确度量中进行大量应用。 虽然开拓性实验证明了两个量子节点的纠缠，最多可分开1.3 km，并且在同一实验室中的三个节点访问了量子网络的全部潜力，需要将这些原型扩展到更多的节点和全球距离。这是一个杰出的挑战，对量子控制保真度，量子相干时间以及固定量子和飞行量子位之间的耦合效率提出了很高的要求。 In this work, I will describe how optical resonators facilitate quantum network nodes that achieve the above-mentioned prerequisites in different physical systems -- trapped atoms, defect centers in wide-bandgap semiconductors, and rare-earth dopants -- by enabling high-fidelity qubit initialization and readout, efficient generation of qubit-photon and remote qubit-qubit entanglement, as well as quantum gates between stationary and飞刺。这些进步为在不久的将来实施全球规模的量子网络开辟了现实的观点。
A future quantum network will consist of quantum processors that are connected by quantum channels, just like conventional computers are wired up to form the Internet. In contrast to classical devices, however, the entanglement and non-local correlations available in a quantum-controlled system facilitate novel fundamental tests of quantum theory. In addition, they enable numerous applications in distributed quantum information processing, quantum communication, and precision measurement. While pioneering experiments have demonstrated the entanglement of two quantum nodes separated by up to 1.3 km, and three nodes in the same laboratory, accessing the full potential of quantum networks requires scaling of these prototypes to many more nodes and global distances. This is an outstanding challenge, posing high demands on qubit control fidelity, qubit coherence time, and coupling efficiency between stationary and flying qubits. In this work, I will describe how optical resonators facilitate quantum network nodes that achieve the above-mentioned prerequisites in different physical systems -- trapped atoms, defect centers in wide-bandgap semiconductors, and rare-earth dopants -- by enabling high-fidelity qubit initialization and readout, efficient generation of qubit-photon and remote qubit-qubit entanglement, as well as quantum gates between stationary and flying qubits. These advances open a realistic perspective towards the implementation of global-scale quantum networks in the near future.
