中文

用于近似Gottesman-Kitaev-Preskill码的记忆辅助解码器

量子物理 2020-11-26 v3

摘要

我们提出了一种基于Glancy与Knill方案[Phys. Rev. A {\bf 73}, 012325 (2006)]的量子纠错协议,适用于经历小高斯随机位移误差的连续变量有限能量近似Gottesman-Kitaev-Preskill(GKP)态。我们表明,将多轮错误综合征提取与贝叶斯估计相结合,相比可比较的单轮方法,可增强对GKP编码量子比特的保护。此外,我们证明在多轮错误随后进行综合征提取中所产生的期望总位移误差以2π2\sqrt{\pi}为界。通过重新编译综合征提取电路,我们表明所有压缩操作均可归入辅助态制备中,将其简化为分束器变换与正交测量。

关键词

引用

@article{arxiv.1912.00829,
  title  = {Memory-assisted decoder for approximate Gottesman-Kitaev-Preskill codes},
  author = {Kwok Ho Wan and Alex Neville and W. S. Kolthammer},
  journal= {arXiv preprint arXiv:1912.00829},
  year   = {2020}
}

备注

We want to thank Jacob Hastrup for notifying us of an repeated numerical error. We also want to thank Luca Cocconi for his useful comments on our numerical simulations