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arXiv 2606.04079quant-phcond-mat.quant-gasphysics.atom-ph
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环面码的量子纠错

Quantum error correction with the toric code

Atom Computing

Atom Computing, Collaborators

AI总结:

利用中性原子阵列平台,通过环面码实现多轮综合征提取和量子比特重载,展示了可扩展至任意深度的重复纠错能力。

摘要:

基于镊子约束中性原子阵列的量子计算平台最近成为一种有竞争力的模式,因为它具有直接实现高量子比特数、快速提高操作保真度以及执行任意量子比特连接电路的能力。这些特性将使得使用高效纠错方案成为可能,这些方案具有高编码率、时间高效的解码以及基于横向门的资源高效架构。基于这些目标,最近最先进的中性原子演示集中在从使用物理量子比特到纠错逻辑量子比特的过渡,但迄今为止还没有演示可扩展至任意深度的重复纠错。在这里,我们展示了在环面量子纠错码中多轮综合征提取,使用中间电路测量和替换丢失的量子比特,包括为无限相干操作重新加载量子比特库。我们表征了多达90轮后的逻辑错误率,表明逻辑信息可以通过多轮量子比特重载得以保存。比较两个码距在多达8轮综合征提取中的表现,显示较大码距的绝对逻辑错误率更低。

英文摘要:

Quantum computing platforms based on arrays of tweezer-confined neutral atoms have recently emerged as a competitive modality thanks to a direct path toward high qubit count, rapidly advancing operation fidelities, and their ability to execute circuits with arbitrary qubit connectivity. These features will enable the use of efficient error correction schemes with high encoding-rates, time-efficient decoding, and resource-efficient architectures based on transversal gates. With these goals in mind, recent state of the art neutral atom demonstrations focus on the transition from the use of physical qubits to error-corrected logical qubits, but to date there has been no demonstration of repeated error correction scalable to arbitrary depth. Here, we demonstrate many cycles of syndrome extraction in a toric quantum error correcting code, using mid-circuit measurement and replacement of lost qubits, including reloading of a qubit reservoir for indefinite coherent operation. We characterize the logical error rate after up to 90 cycles, showing that logical information can be preserved through multiple rounds of qubit reloading. Comparing two distances of the code up to 8 rounds of syndrome extraction shows a lower absolute logical error rate for the larger distance code.

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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