Operational multipartite entanglement measures

Katharina Schwaiger, David Sauerwein, Martí Cuquet, Julio I. de Vicente, Barbara Kraus.
Physical Review Letters 115, 150502 (2015).
[ arXiv:1503.00615 | PDF | Bibtex ]

We introduce two operational entanglement measures that are applicable for arbitrary multipartite (pure or mixed) states. One of them characterizes the potentiality of a state to generate other states via local operations assisted by classical communication and the other characterizes the simplicity of generating the state at hand. We show how these measures can be generalized to two classes of entanglement measures. Moreover, we compute the new measures for pure few-partite systems and use them to characterize the entanglement contained in a three-qubit state. We identify the Greenberger-Horne-Zeilinger and W state as the most powerful pure three-qubit states regarding state manipulation.

@article{Schwaiger2015_operational,
  title = {Operational Multipartite Entanglement Measures},
  author = {Schwaiger, K. and Sauerwein, D. and Cuquet, M. and de Vicente, J. I. and Kraus, B.},
  journal = {Physical Review Letters},
  volume = {115},
  number = {15},
  pages = {150502},
  numpages = {5},
  year = {2015},
  month = {oct},
  publisher = {American Physical Society},
  doi = {10.1103/PhysRevLett.115.150502},
  url = {http://link.aps.org/doi/10.1103/PhysRevLett.115.150502},
  arxivId = {1503.00615},
}