Bounds on the entanglement of two-qutrit systems from fixed marginals
Giuseppe Baio , Dariusz Chruściński , Paweł Horodecki , Antonino Messina , Gniewomir Sarbicki
AbstractWe discuss the problem of characterizing upper bounds on entanglement in a bipartite quantum system when only the reduced density matrices (marginals) are known. In particular, starting from the known two-qubit case, we propose a family of candidates for maximally entangled mixed states with respect to fixed marginals for two qutrits. These states are extremal in the convex set of two-qutrit states with fixed marginals. Moreover, it is shown that they are always quasidistillable. As a by-product we prove that any maximally correlated state that is quasidistillable must be pure. Our observations for two qutrits are supported by numerical analysis.
|Journal series||Physical Review A, ISSN 2469-9926, e-ISSN 2469-9934, (N/A 100 pkt)|
|Publication size in sheets||0.5|
|Score||= 100.0, 28-01-2020, ArticleFromJournal|
|Publication indicators||: 2017 = 0.886; : 2018 = 2.907 (2) - 2018=2.723 (5)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.