论文标题

具有基于Majorana Qubit的平面浮子代码的性能

Performance of planar Floquet codes with Majorana-based qubits

论文作者

Paetznick, Adam, Knapp, Christina, Delfosse, Nicolas, Bauer, Bela, Haah, Jeongwan, Hastings, Matthew B., da Silva, Marcus P.

论文摘要

量子误差校正对于任何量子计算平台都至关重要,以实现真正可扩展的量子计算。由于其高阈值,低开销和相对简单的结构,因此表面代码及其变体被认为是最有希望的量子误差校正方案,这些结构自然可以在许多现有的量子体系结构(例如超导Qubits)中实现。 Floquet代码的最新开发提供了另一种有希望的方法。通过超越稳定器代码的通常范式,Floquet代码完全由两量尺寸的测量构建时,实现了相似的性能。这使得它们特别适用于可以直接实施两量量测量的平台,例如基于Majorana零模式(MZMS)的仅测量拓扑量表。在这里,我们解释了如何在基于MZM的体系结构上实现两种变体,而无需进行任何辅助量子矩阵测量和浅层综合征提取序列。然后,我们从数字上证明了它们的有利表现。特别是,我们表明它们通过数量级提高了基于MZM的系统的可扩展量子计算的阈值,并显着降低了低于阈值的空间和时间开销。

Quantum error correction is crucial for any quantum computing platform to achieve truly scalable quantum computation. The surface code and its variants have been considered the most promising quantum error correction scheme due to their high threshold, low overhead, and relatively simple structure that can naturally be implemented in many existing qubit architectures, such as superconducting qubits. The recent development of Floquet codes offers another promising approach. By going beyond the usual paradigm of stabilizer codes, Floquet codes achieve similar performance while being constructed entirely from two-qubit measurements. This makes them particularly suitable for platforms where two-qubit measurements can be implemented directly, such as measurement-only topological qubits based on Majorana zero modes (MZMs). Here, we explain how two variants of Floquet codes can be implemented on MZM-based architectures without any auxiliary qubits for syndrome measurement and with shallow syndrome extraction sequences. We then numerically demonstrate their favorable performance. In particular, we show that they improve the threshold for scalable quantum computation in MZM-based systems by an order of magnitude, and significantly reduce space and time overheads below threshold.

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