标题： 使用包含5到50个量子比特的单元，具有非常损耗和噪声的光子链路的可自由扩展的量子技术 显示英文标题

标题： Freely Scalable Quantum Technologies using Cells of 5-to-50 Qubits with Very Lossy and Noisy Photonic Links

摘要： 在小型离子阱、氮空位中心和超导量子比特簇中，现在已经实现了精妙的量子控制。 我们可以将这样的系统视为一个通用单元，具有从通信到大规模计算的各种技术用途，前提是该单元能够与其他单元联网，并克服互联中的噪声。 在这里，我们展示了一种容损的纠缠纯化方法，使得在当今现实的噪声和损耗连接下实现量子计算成为可能：通过一个适度复杂的单元设计，并使用具有13.3%网络噪声阈值的表面码协议，我们发现尝试以2MHz的速率进行纠缠但遭受98%光子损耗的互联可以导致千赫兹的计算机时钟速度（即高保真稳定器测量速率）。 改进的连接将显著提高时钟速度。 我们的模拟采用了在离子阱设备中已经实现的局部门。 显示英文摘要

摘要： Exquisite quantum control has now been achieved in small ion traps, in nitrogen-vacancy centres and in superconducting qubit clusters. We can regard such a system as a universal cell with diverse technological uses from communication to large-scale computing, provided that the cell is able to network with others and overcome any noise in the interlinks. Here we show that loss-tolerant entanglement purification makes quantum computing feasible with the noisy and lossy links that are realistic today: With a modestly complex cell design, and using a surface code protocol with a network noise threshold of 13.3%, we find that interlinks which attempt entanglement at a rate of 2MHz but suffer 98% photon loss can result in kilohertz computer clock speeds (i.e. rate of high fidelity stabilizer measurements). Improved links would dramatically increase the clock speed. Our simulations employed local gates of a fidelity already achieved in ion trap devices.