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Concurrence vectors for entanglement of high-dimensional systems

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Abstract

The concurrence vectors are proposed by employing the fundamental representation of A n Lie algebra, which provides a clear criterion to evaluate the entanglement of bipartite systems of arbitrary dimension. Accordingly, a state is separable if the norm of its concurrence vector vanishes. The state vectors related to SU(3) states and SO(3) states are discussed in detail. The sign situation of nonzero components of concurrence vectors of entangled bases presents a simple criterion to judge whether the whole Hilbert subspace spanned by those bases is entangled, or there exists an entanglement edge. This is illustrated in terms of the concurrence surfaces of several concrete examples.

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Authors and Affiliations

  1. Zhejiang Institute of Modern Physics, Zhejiang University, Hangzhou, 310027, China

    You-Quan Li & Guo-Qiang Zhu

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  1. You-Quan Li
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  2. Guo-Qiang Zhu
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Correspondence to You-Quan Li.

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Li, YQ., Zhu, GQ. Concurrence vectors for entanglement of high-dimensional systems. Front. Phys. China 3, 250–257 (2008). https://doi.org/10.1007/s11467-008-0022-2

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  • DOI: https://doi.org/10.1007/s11467-008-0022-2

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