论文标题
嘈杂量子计算设备中的状态依赖性路由动力学
State-dependent Routing Dynamics in Noisy Quantum Computing Devices
论文作者
论文摘要
路由在编程嘈杂，中间量子量子（NISQ）设备中起重要作用，在该设备中，通过在位置之间交换量子信息来克服寄存器中的连接有限。但是，使用嘈杂的门对量子状态进行路由会引入非平凡的噪声动力学，并在最佳途径上确定最小化累计误差的途径需要对预期状态保真度进行估计。在这里，我们验证了基于相关二进制噪声的NISQ处理器中状态依赖性路由动力学的模型。我们为CNOT和交换操作开发了一个可综合的，依赖状态的噪声模型，可以使用成对的实验测量有效地表征该模型，并将模型预测与从量子设备中恢复的层析成像状态重建进行比较。这些结果捕获了与状态相关的路由动力学，这些动力学是指导NISQ设备近实时操作的路由决策所需的。
Routing plays an important role in programming noisy, intermediate-scale quantum (NISQ) devices, where limited connectivity in the register is overcome by swapping quantum information between locations. However, routing a quantum state using noisy gates introduces non-trivial noise dynamics, and deciding on an optimal route to minimize accumulated error requires estimates of the expected state fidelity. Here we validate a model for state-dependent routing dynamics in a NISQ processor based on correlated binary noise. We develop a composable, state-dependent noise model for CNOT and SWAP operations that can be characterized efficiently using pair-wise experimental measurements, and we compare model predictions with tomographic state reconstructions recovered from a quantum device. These results capture the state-dependent routing dynamics that are needed to guide routing decisions for near-real time operation of NISQ devices.
