亚维线性光学量子计算：从高维资源态到量子比特量子计算
Subdimensional linear-optical quantum computation: from qudit resource states to qubit quantum computation
- Basic Research Laboratories & NTT Research Center for Theoretical Quantum Information, NTT Inc.（基础实验室与NTT理论量子信息研究中心，NTT公司）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本文提出一种从高维纠缠态子空间执行量子比特计算的线性光学方案，将融合成功概率提升至1-1/d，并数值验证了其在保持光子数下提高损耗容忍度。
AI中文摘要：
本文提出一种线性光学量子计算方案，该方案从高维纠缠的量子比特（qudit）出发，但在其子空间定义的量子比特（qubit）上执行量子计算。这种方法使我们能够在不依赖现有使用辅助光子和量子编码的方法的情况下，将线性光学融合的成功概率从50%提高到1-1/d（其中d为量子比特的维度）。特别地，我们展示了可以通过成对融合门从5-qudit一维簇态生成二维量子比特簇态，同时保持其增强的成功概率。我们通过数值模拟证明，这种方法可以在保持每个资源态光子数不变的情况下，提高基于渗滤方案的损耗容忍度。
英文摘要：
In this paper, we propose a linear-optical quantum computation scheme that starts from high-dimensionally entangled qudits but performs quantum computation on qubits defined in their subspaces. This approach enables us to increase the success probability of linear-optical fusions from $50\%$ to $1-1/d$ for qudits of dimension $d$ without relying on existing approaches using ancilla photons and quantum codes. In particular, we show that a 2D cluster state of qubits can be generated from 5-qudit 1D cluster states using pairwise fusion gates while preserving their boosted success probability. We numerically demonstrate that this approach can improve the loss tolerance of a percolation-based scheme while keeping the photon number per resource state constant.
