Distributed Quantum Computing with Photons and Atomic Memories
Distributed Quantum Computing with Photons and Atomic Memories
复制标题
使用光子和原子存储器的分布式量子计算
DOI：
10.1002/qute.202300007
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发表时间：
2022-07
影响因子：
4.4
通讯作者：
E. Oh;Xuanying Lai;J. Wen;Shengwang Du
中科院分区：
文献类型：
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作者：
E. Oh;Xuanying Lai;J. Wen;Shengwang Du
普适量子计算的前景需要可扩展的单量子比特和量子比特间控制交互。目前，量子计算的三个领先候选平台是基于超导电路、囚禁离子和中性原子阵列。然而，这些系统与环境和控制噪声有很强的相互作用，这些噪声引入了量子比特态的消相干和门操作。或者，光子与环境很好地解耦，并且在量子计算的速度和定时方面具有优势。光子系统已经展示了解决特定棘手问题(如玻色子采样)的能力，但在实际可扩展的通用量子计算解决方案方面面临挑战，因为单个光子很难与另一个光子确定地“交谈”。本文提出了一种基于光子和基于原子集成的量子存储的通用分布式量子计算方案。利用已建立的光子优势，通过将光子量子比特转换为量子存储状态，并利用里德堡阻塞进行受控门操作，实现了两量子比特的非线性相互作用。进一步证明了该方案在空间和时间上的可扩展性。这些结果表明，光子-原子网络混合方法可以成为通用分布式量子计算的一种潜在解决方案。
The promise of universal quantum computing requires scalable single‐ and inter‐qubit control interactions. Currently, three of the leading candidate platforms for quantum computing are based on superconducting circuits, trapped ions, and neutral atom arrays. However, these systems have strong interaction with environmental and control noises that introduce decoherence of qubit states and gate operations. Alternatively, photons are well decoupled from the environment and have advantages of speed and timing for quantum computing. Photonic systems have already demonstrated capability for solving specific intractable problems like Boson sampling, but face challenges for practically scalable universal quantum computing solutions because it is extremely difficult for a single photon to “talk” to another deterministically. Here, a universal distributed quantum computing scheme based on photons and atomic‐ensemble‐based quantum memories is proposed. Taking the established photonic advantages, two‐qubit nonlinear interaction is mediated by converting photonic qubits into quantum memory states and employing Rydberg blockade for the controlled gate operation. Spatial and temporal scalability of this scheme is demonstrated further. These results show photon‐atom network hybrid approach can be a potential solution to universal distributed quantum computing.