Generation of time-domain-multiplexed two-dimensional cluster state
Generation of time-domain-multiplexed two-dimensional cluster state
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DOI：
10.1126/science.aay2645
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发表时间：
2019-10-18
期刊：
影响因子：
56.9
通讯作者：
Furusawa, Akira
中科院分区：
文献类型：
--
作者：
Asavanant, Warit;Shiozawa, Yu;Furusawa, Akira
纠缠是基于测量的量子计算的关键资源。它被存储在称为簇态的量子态中，这些量子态是离线准备的，并通过纯粹的本地测量实现量子计算。通用量子计算需要既大又具有（至少）二维拓扑结构的簇态。基于玻色子模式而不是量子比特的连续变量团簇状态先前已经在超过一百万个模式的规模上产生，但仅在一维中。在这里，我们报告生成一个大规模的二维连续变量集群状态。它的结构由一个5 × 1240的正方形晶格组成，该晶格是为我们高度可扩展的时间复用实验平台量身定制的。它与玻色子纠错码兼容，具有更高的压缩，使容错量子计算成为可能。
Entanglement is the key resource for measurement-based quantum computing. It is stored in quantum states known as cluster states, which are prepared offline and enable quantum computing by means of purely local measurements. Universal quantum computing requires cluster states that are both large and possess (at least) a two-dimensional topology. Continuous-variable cluster states-based on bosonic modes rather than qubits-have previously been generated on a scale exceeding one million modes, but only in one dimension. Here, we report generation of a large-scale two-dimensional continuous-variable cluster state. Its structure consists of a 5- by 1240-site square lattice that was tailored to our highly scalable time-multiplexed experimental platform. It is compatible with Bosonic error-correcting codes that, with higher squeezing, enable fault-tolerant quantum computation.