arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1509.03239quant-ph
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双重颜色代码

Doubled Color Codes

Sergey Bravyi, Andrew Cross

摘要:

我们展示了如何在2D架构中仅使用横向酉算子和局部综合征测量来执行容错通用量子计算。我们的方法是基于一个双重版本的二维颜色代码。它使所有的逻辑门的Clifford+T基的横向实现使用的规范固定方法最近提出的Paetznick和Reichardt。规范固定需要六个量子比特的奇偶性测量的泡利运营商支持的蜂窝晶格的面与两个量子比特每个网站。由于双色码不需要状态蒸馏,因此双色码是逻辑门实验的理想选择。其次,我们提出了一个极大似然算法的误差校正和规范固定的任务,使逻辑电路的Clifford+T基础上的数值模拟。该算法可以用于在线制度,这样一个新的错误的综合征是揭示在每个时间步。我们估计的平均数量的逻辑门,可以可靠地实现最小的加倍的颜色代码和玩具噪声模型,包括去极化记忆错误和综合症测量错误。

英文摘要:

We show how to perform a fault-tolerant universal quantum computation in 2D architectures using only transversal unitary operators and local syndrome measurements. Our approach is based on a doubled version of the 2D color code. It enables a transversal implementation of all logical gates in the Clifford+T basis using the gauge fixing method proposed recently by Paetznick and Reichardt. The gauge fixing requires six-qubit parity measurements for Pauli operators supported on faces of the honeycomb lattice with two qubits per site. Doubled color codes are promising candidates for the experimental demonstration of logical gates since they do not require state distillation. Secondly, we propose a Maximum Likelihood algorithm for the error correction and gauge fixing tasks that enables a numerical simulation of logical circuits in the Clifford+T basis. The algorithm can be used in the online regime such that a new error syndrome is revealed at each time step. We estimate the average number of logical gates that can be implemented reliably for the smallest doubled color code and a toy noise model that includes depolarizing memory errors and syndrome measurement errors.

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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