论文标题
使用量子传送的无切换时间域光量子计算
Switching-free time-domain optical quantum computation with quantum teleportation
论文作者
论文摘要
光学开关和重新路由网络是实现光学量子计算机的主要障碍。特别是，这两个组件都被认为是基于测量的时间域光学量子计算的必不可少的组成部分，该计算在近年来已经看到了有关可伸缩性的有希望的发展。但是，实现具有足够性能的光学开关和重新路由网络是在实验上具有挑战性的，因为它们必须具有极低的损失，较小的切换时间，高重复率和最低光学非线性。在这项工作中，我们提出了一个不需要此类光学开关的光学量子计算平台。我们的方法基于基于连续的可变量基于基于测量的量子计算，在这种量子计算中，我们会修改量子纠缠的结构，以便使用量子传送协议而不是光学切换和重新布置。我们还表明，当与Gottesman-Kitaev-Preskill编码结合使用时，当交换机的光损失不低时，我们的体系结构可以用光学开关优于架构。
Optical switches and rerouting network are main obstacles to realize optical quantum computer. In particular, both components have been considered as essential components to the measurement-based time-domain optical quantum computation, which has seen promising developments regarding scalability in the recent years. Realizing optical switches and rerouting network with sufficient performance is, however, experimentally challenging as they must have extremely low loss, small switching time, high repetition rate, and minimum optical nonlinearity. In this work, we present an optical quantum computation platform that does not require such optical switches. Our method is based on continuous-variable measurement-based quantum computation, where instead of the typical cluster states, we modify the structure of the quantum entanglements, so that quantum teleportation protocol can be employed instead of the optical switching and rerouting. We also show that when combined with Gottesman-Kitaev-Preskill encoding, our architecture can outperform the architecture with optical switches when the optical losses of the switches are not low.
