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arXiv quant-ph/0508176quant-ph
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容错量子计算中伪阈值分析的流图模型

A flow-map model for analyzing pseudothresholds in fault-tolerant quantum computing

K. M. Svore, A. W. Cross, I. L. Chuang, A. V. Aho

摘要:

一个任意可靠的量子计算机可以使用递归模拟程序从噪声组件中有效地构建出来,只要这些组件的故障概率小于容错阈值。最近估计的阈值接近一些实验实现的门的结晶度。然而,阈值估计的景观包括伪阈值,阈值估计的基础上的一个子集的组件和低级别的递归。在本文中,我们观察到,伪阈值是一个通用的现象,在容错计算。我们定义pseudotherwise和目前的经典和量子容错电路表现出pseudotherwise不同的因素4从容错阈值组件故障率之间的典型关系。我们开发的工具,可视化的可靠性是如何影响递归模拟,以确定渐近阈值。最后,我们推测,这些方法的改进可能会建立特定代码和噪声模型的容错阈值的上限。

英文摘要:

An arbitrarily reliable quantum computer can be efficiently constructed from noisy components using a recursive simulation procedure, provided that those components fail with probability less than the fault-tolerance threshold. Recent estimates of the threshold are near some experimentally achieved gate fidelities. However, the landscape of threshold estimates includes pseudothresholds, threshold estimates based on a subset of components and a low level of recursion. In this paper, we observe that pseudothresholds are a generic phenomenon in fault-tolerant computation. We define pseudothresholds and present classical and quantum fault-tolerant circuits exhibiting pseudothresholds that differ by a factor of 4 from fault-tolerance thresholds for typical relationships between component failure rates. We develop tools for visualizing how reliability is influenced by recursive simulation in order to determine the asymptotic threshold. Finally, we conjecture that refinements of these methods may establish upper bounds on the fault-tolerance threshold for particular codes and noise models.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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