Boosted Bell-state measurements for photonic quantum computation

IF 6.6 1区 物理与天体物理 Q1 PHYSICS, APPLIED
Nico Hauser, Matthias J. Bayerbach, Simone E. D’Aurelio, Raphael Weber, Matteo Santandrea, Shreya P. Kumar, Ish Dhand, Stefanie Barz
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引用次数: 0

Abstract

Fault-tolerant fusion-based photonic quantum computing (FBQC) greatly relies on entangling two-photon measurements, called fusions. These fusions can be realized using linear-optical projective Bell-state measurements (BSMs). These linear-optical BSMs are limited to a success probability of 50%, greatly reducing the performance of FBQC schemes. The performance of FBQC can be improved using boosting, thus achieving higher success probabilities by adding additional resources. Here, we realize a boosted BSM using a 4 × 4 multiport splitter and an additional entangled photon pair, allowing for a success probability of up to 75%. In our experiment, we obtain a success probability for our boosted BSM of (69.3 ± 0.3)%, clearly exceeding the 50% limit. We further demonstrate the significance of our boosted BSM for FBQC, showing a threefold increase in robustness to photon loss and a significant reduction of the logical error rates.

Abstract Image

光子量子计算的增强钟态测量
基于融合的容错光子量子计算(FBQC)在很大程度上依赖于纠缠双光子测量,称为融合。这些融合可以通过线性光学投影贝尔态测量(bsm)来实现。这些线性光学bsm的成功率限制在50%,大大降低了FBQC方案的性能。FBQC的性能可以通过增加额外的资源来提高,从而获得更高的成功概率。在这里,我们使用一个4 × 4多端口分离器和一个额外的纠缠光子对实现了一个增强的BSM,允许成功概率高达75%。在我们的实验中,我们获得了我们的提升BSM的成功率为(69.3±0.3)%,明显超过了50%的限制。我们进一步证明了我们改进的BSM对FBQC的重要性,显示出对光子损失的鲁棒性增加了三倍,并显着降低了逻辑错误率。
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来源期刊
npj Quantum Information
npj Quantum Information Computer Science-Computer Science (miscellaneous)
CiteScore
13.70
自引率
3.90%
发文量
130
审稿时长
29 weeks
期刊介绍: The scope of npj Quantum Information spans across all relevant disciplines, fields, approaches and levels and so considers outstanding work ranging from fundamental research to applications and technologies.
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