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arXiv quant-ph/0603035quant-ph
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真三粒子纠缠存在的判据

Existence Criterion of Genuine Tripartite Entanglement

Chang-shui Yu He-shan Song

摘要:

本文给出了一个直观的数学公式,将三重量子比特系统(Phys.Rev.A \textbf{61},052306(2000))的剩余纠缠推广到高维的三重量子比特系统.其精神在于三重纯态的张量处理(Phys. Rev. A \textbf{72},022333(2005))。该推广的一个显著特点是高维系统的表述在子系统的置换下是不变的,因此被用作检验真三重纠缠存在性的一个判据。此外,利用克罗内克积近似技术,纯态的公式可以方便地推广到混合态的情况。作为应用,我们给出了弱混合三重量子态判据的解析近似,并考虑了某些弱混合态的真三重纠缠的存在性。

英文摘要:

In this paper, an intuitive mathematical formulation is provided to generalize the residual entanglement for tripartite systems of qubits (Phys. Rev. A \textbf{61}, 052306 (2000)) to the tripartite systems in higher dimension. The spirit lies in the tensor treatment of tripartite pure states (Phys. Rev. A \textbf{72}, 022333 (2005)). A distinct characteristic of the present generalization is that the formulation for higher dimensional systems is invariant under permutation of the subsystems, hence is employed as a criterion to test the existence of genuine tripartite entanglement. Furthermore, the formulation for pure states can be conveniently extended to the case of mixed states by utilizing the kronecker product approximate technique. As applications, we give the analytic approximation of the criterion for weakly mixed tripartite quantum states and consider the existence of genuine tripartite entanglement of some weakly mixed states.

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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