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arXiv 1108.4909quant-ph
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随机局域操作和经典通信变换团簇态的量子计算策略

Strategies for measurement-based quantum computation with cluster states transformed by stochastic local operations and classical communication

Adam G. D'Souza, David L. Feder

摘要:

我们研究集群状态转换的随机本地操作和经典的通信,作为一种资源,确定性的通用计算严格驱动的投影测量。我们确定的情况下,这种状态在一个维度上构成资源的随机长度单量子比特旋转,在一种情况下准确定性(N-U-N状态),并在另一种概率(B-U-B状态)。与团簇态相比,N-U-N态的自旋关联函数随距离呈指数衰减,而B-U-B态可以是任意的局域纯态。二维正方形N-U-N晶格是基于准确定性测量的量子计算的通用资源。对立方B-U-B态的测量产生了具有键缺陷的二维团簇态,其连通性超过了局部纯度临界值的逾渗阈值。

英文摘要:

We examine cluster states transformed by stochastic local operations and classical communication, as a resource for deterministic universal computation driven strictly by projective measurements. We identify circumstances under which such states in one dimension constitute resources for random length single-qubit rotations, in one case quasi-deterministically (N-U-N states) and in another probabilistically (B-U-B states). In contrast to the cluster states, the N-U-N states exhibit spin correlation functions that decay exponentially with distance, while the B-U-B states can be arbitrarily locally pure. A two-dimensional square N-U-N lattice is a universal resource for quasideterministic measurement-based quantum computation. Measurements on cubic B-U-B states yield two-dimensional cluster states with bond defects, whose connectivity exceeds the percolation threshold for a critical value of the local purity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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