Quantum computing with multidimensional continuous-variable cluster states in a scalable photonic platform
Quantum computing with multidimensional continuous-variable cluster states in a scalable photonic platform
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DOI：
10.1103/physrevresearch.2.023138
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发表时间：
2019-09
影响因子：
4.2
通讯作者：
Bo-Han Wu;R. N. Alexander;Shuai Liu;Zheshen Zhang
中科院分区：
文献类型：
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作者：
Bo-Han Wu;R. N. Alexander;Shuai Liu;Zheshen Zhang
量子计算是一种颠覆性的范式，被广泛认为能够解决经典的棘手问题。然而，迈向全面量子计算机的道路受到与平台可扩展性、量子位连接性以及各种组件所需保真度相关的巨大挑战的阻碍。单向量子计算是一种有吸引力的方法，它将负担从高保真量子门和量子存储器转移到生成高质量的纠缠资源态和高保真测量。团簇态是单向量子计算的重要组成部分，一个紧凑、便携和可大规模生产的大规模团簇态平台对于单向量子计算的广泛部署至关重要。在这里，我们桥接两个不同的领域-克尔微梳和连续变量（CV）量子信息-制定一个单向量子计算架构的基础上可编程的大规模CV集群状态。该体系结构可以容纳数百个同时可寻址的纠缠光模复用在频域和无限数量的顺序可寻址的纠缠光模在时域。一维，二维和三维CV团簇状态可以确定性地产生。我们注意到，至少三维的集群状态是容错的单向量子计算与已知的纠错策略所必需的。这种架构可以很容易地用硅光子实现，为大规模量子计算开辟了一条有前途的道路。
Quantum computing is a disruptive paradigm widely believed to be capable of solving classically intractable problems. However, the route toward full-scale quantum computers is obstructed by immense challenges associated with the scalability of the platform, the connectivity of qubits, and the required fidelity of various components. One-way quantum computing is an appealing approach that shifts the burden from high-fidelity quantum gates and quantum memories to the generation of high-quality entangled resource states and high fidelity measurements. Cluster states are an important ingredient for one-way quantum computing, and a compact, portable, and mass producible platform for large-scale cluster states will be essential for the widespread deployment of one-way quantum computing. Here, we bridge two distinct fields---Kerr microcombs and continuous-variable (CV) quantum information---to formulate a one-way quantum computing architecture based on programmable large-scale CV cluster states. The architecture can accommodate hundreds of simultaneously addressable entangled optical modes multiplexed in the frequency domain and an unlimited number of sequentially addressable entangled optical modes in time domain. One-dimensional, two-dimensional, and three-dimensional CV cluster states can be deterministically produced. We note cluster states of at least three dimensions are required for fault-tolerant one-way quantum computing with known error-correction strategies. This architecture can be readily implemented with silicon photonics, opening a promising avenue for quantum computing at a large scale.