X.-H. Gao

Publications (5)1.56 Total impact

• Article: Estimation of concurrence for multipartite mixed states

  X.-H. Gao, S.-M. Fei
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  ABSTRACT: We investigate the lower bound of concurrence for multipartite quantum mixed states. Analytical lower bounds are derived for some multipartite systems, by establishing functional relations between concurrence and the generalized partial transpositions.
  The European Physical Journal Special Topics 04/2012; 159(1):71-77. · 1.56 Impact Factor
• Source

  Available from: arxiv.org

  Article: Matrix Tensor Product Approach to the Equivalence of Multipartite States under Local Unitary Transformations

  X.-H. Gao, S. Alberverio, S.-M. Fei, Z.-X. Wang
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  ABSTRACT: The equivalence of multipartite quantum mixed states under local unitary transformations is studied. A criterion for the equivalence of non-degenerate mixed multipartite quantum states under local unitary transformations is presented.
  03/2006;
• Source

  Available from: arxiv.org

  Article: Canonical Form and Separability of PPT States in 2x2x2xN Composite Quantum Systems

  S.-M. Fei, X.-H. Gao, X.-H. Wang, Z.-X. Wang, Ke Wu
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  ABSTRACT: We give a canonical form of PPT states in ${\cal C}^2 \otimes {\cal C}^2\otimes {\cal C}^2 \otimes {\cal C}^N$ with rank=$N$. From this canonical form a necessary separable condition for these states is presented.
  11/2003;
• Source

  Available from: arxiv.org

  Article: Separability and entanglement in 2x3xN composite quantum systems

  S.-M. Fei, X.-H. Gao, X.-H. Wang, Z.-X. Wang, K. Wu
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  ABSTRACT: The separability and entanglement of quantum mixed states in $\Cb^2 \otimes \Cb^3 \otimes \Cb^N$ composite quantum systems are investigated. It is shown that all quantum states $\rho$ with positive partial transposes and rank $r(\rho)\leq N$ are separable. Comment: Latex, 15 pages
  08/2003;
• Article: Entanglement of formation and concurrence for mixed states

  X. Li-Jost, K. Chen, S. Albeverio, X.-H. Gao, S.-M. Fei
  Frontiers of Computer Science in China, v.2, 114-128 (2008).