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A Criterion to identify maximally entangled nine-qubit state
Laser Physics Letters ( IF 1.4 ) Pub Date : 2020-01-28 , DOI: 10.1088/1612-202x/ab6a16
Xinwei Zha 1 , Irfan Ahmed 2, 3 , Da Zhang 4 , Yanpeng Zhang 4
Affiliation  

We present a generalized criterion for maximally entangled nine-qubit states, whose minimum averaged subsystem purity should be equal to 1/14. In this note, we prove that absolutely maximally entangled state for nine qubits does not exist. Further, we construct a new genuine nine-qubit maximally entangled states of 110,15 and 1 balanced purities equal to 1/16, , 1/8 and and 1/4, respectively. We found that, the marginal density matrices for subsystems of 1,2,3- qubits all completely mixed in these states, therefore, maximally entangled nine-qubit state is a 3-uniform state.

中文翻译:

识别最大纠缠九量子比特状态的标准

我们提出了最大纠缠九量子位状态的通用标准,其最小平均子系统纯度应等于 1/14。在这篇笔记中,我们证明了 9 个量子比特的绝对最大纠缠状态不存在。此外,我们构建了一个新的真正的 9 量子比特最大纠缠态,110,15 和 1 平衡纯度分别等于 1/16、1/8 和 1/4。我们发现,1,2,3-qubits 子系统的边际密度矩阵都完全混合在这些状态中,因此,最大纠缠态 9-qubits 状态是 3-uniform 状态。
更新日期:2020-01-28
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