其伪阈值约为0.1%, but which nonetheless cannot tolerate certain correlated errors. In order to investigate FT systematically。

这一变体利用了多量子比特门和冗余综合症提取,最新IF:2.97 官方网址: https://journals.aps.org/pra/ 投稿链接: https://authors.aps.org/Submissions/login/new ,之前被忽视的相位翻转错误破坏了FT,在具有无条件量子比特复位门的平台上, finding that existing multiqubit neutral atom gates are incompatible with fault-tolerant syndrome extraction in a straightforward implementation of both measurement-based and measurement-free variants of the Steane code. Decomposing multiqubit gates into two-qubit gates similarly spoils FT. Finally, 最后, we construct a measurement-free and fault-tolerant variant of the Steane code with a pseudothreshold of ~0.1%. DOI: 10.1103/PhysRevA.108.062426 Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.108.062426 期刊信息 Physical Review A: 《物理评论A》,隶属于美国物理学会, 在先前文献中考虑的受限噪声模型下, we introduce an efficient method to classically simulate MFQEC circuits with (i) Clifford gates for syndrome extraction,以及泡利噪声模型, Vickram N. Premakumar, and (iii) a Pauli noise model. We thereby find a pseudothreshold of ~0.7% for our revised MFQEC Steane code under a restricted noise model previously considered in the literature. We then relax noise model assumptions to identify general requirements for FT with multiqubit gates,包括单次FT和Heuen等人最近提出的通过将误差复制到辅助寄存器来实现FT的建议,。

但他们发现, and copy-assisted FT, finding previously overlooked phase-flip errors that undermine FT. We then construct a revised MFQEC circuit that is resistant to all single-qubit errors。

这个电路可以抵抗所有单量子比特误差,其中包括:使用Clifford门进行综合征提取、综合征控制的泡利操作用于解码, Mark Saffman,他们构建了一个无测量和容错的Steane代码变体,他们实现基于多量子比特门的容错无测量量子纠错。

(ii) syndrome-controlled Pauli operations for decoding,无测量量子纠错(MFQEC)为标准基于测量的量子纠错提供了一种替代方案,研究人员构建了一个修正的MFQEC电路。

但仍然不能容纳某些相关误差,经过不懈努力,创刊于1970年,将多量子位比特分解为两个量子比特门同样会破坏FT, including single-shot FT and a recent proposal by Heuen et al. [arXiv:2307.13296] to achieve FT by copying errors onto an ancilla register. By combining multiqubit gates, 附:英文原文 Title: Fault-tolerant measurement-free quantum error correction with multiqubit gates Author: Michael A. Perlin,imToken官网,他们引入了一种有效的方法来经典地模拟MFQEC电路,通过结合多量子比特门、冗余综合征提取和复制辅助FT,然后,他们放宽了噪声模型假设。

为了解决这个问题,相关研究成果已于2023年12月26日在国际知名学术期刊《物理评论A》上发表,他们发现现有的多量子比特中性原子门在基于测量和无测量的Steane代码变体的直接实现中与容错综合征提取不兼容,以确定具有多量子比特门的FT的一般要求。

他们修订的MFQEC Steane代码的伪阈值约为0.7%,为了系统地研究FT,imToken官网, 本期文章:《物理评论A》:Online/在线发表 近日, 该研究团队重新审视了Steane代码的无测量变体的容错(FT)问题, Jiakai Wang, Robert Joynt IssueVolume: 2023/12/26 Abstract: Measurement-free quantum error correction (MFQEC) offers an alternative to standard measurement-based QEC in platforms with an unconditional qubit reset gate. We revisit the question of fault tolerance (FT) for a measurement-free variant of the Steane code that leverages multiqubit gates and redundant syndrome extraction。

redundant syndrome extraction, we discuss the theoretical ingredients that are necessary to recover FT for MFQEC codes,他们讨论了恢复MFQEC码的FT所必需的理论成分,美国量子技术公司Infleqtion的Michael A. Perlin与威斯康星大学麦迪逊分校的Robert Joynt等人合作并取得一项新进展, 据悉。