Quantifying entanglement of arbitrary-dimensional multipartite pure states in terms of the singular values of coefficient matrices

Quantifying entanglement of arbitrary-dimensional multipartite pure states in terms of the singular values of coefficient matrices
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用系数矩阵的奇异值量化任意维多部分纯态的纠缠

DOI:
10.1103/physreva.87.042335
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发表时间:
2013-04
期刊:
影响因子:
2.9
通讯作者:
Long, Guilu
Long, Guilu
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Li, Hui;Wang, Shuhao;Cui, Jianlian;Long, Guilu

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多体量子态的纠缠量化和分类是量子信息学的两个重要研究领域。本文通过研究任意维多体纯态的平均部分熵,即平均部分熵(MAPE)的曼哈顿距离($l_1$ norm),研究了多体纯态的纠缠,证明了它是纯态的一种纠缠度量.我们将纠缠分类中的重要工具--系数矩阵与MAPE联系起来,并利用系数矩阵的非零奇异值重新表示了任意维多体纯态的MAPE。利用MAPE方法研究了n量子比特迪凯态、任意维Greenberger-Horne-Zeilinger态和D3 n量子比特态的纠缠特性,并通过两个例子证明了对称态的纠缠度与系数矩阵秩的关系.
The entanglement quantification and classification of multipartite quantum states are two important research fields in quantum information. In this work, we study the entanglement of arbitrary-dimensional multipartite pure states by looking at the averaged partial entropies of various bipartite partitions of the system, namely, the so-called Manhattan distance ($l_1$ norm) of averaged partial entropies (MAPE), and it is proved to be an entanglement measure for pure states. We connected the MAPE with the coefficient matrices, which are important tools in entanglement classification and reexpressed the MAPE for arbitrary-dimensional multipartite pure states by the nonzero singular values of the coefficient matrices. The entanglement properties of the $n$-qubit Dicke states, arbitrary-dimensional Greenberger-Horne-Zeilinger states, and $D_3^n$ states are investigated in terms of the MAPE, and the relation between the rank of the coefficient matrix and the degree of entanglement is demonstrated for symmetric states by two examples.
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