Entanglement cost of mixed states
Quantum Physics
2009-11-07 v4
Abstract
We compute the entanglement cost of several families of bipartite mixed states, including arbitrary mixtures of two Bell states. This is achieved by developing a technique that allows us to ascertain the additivity of the entanglement of formation for any state supported on specific subspaces. As a side result, the proof of the irreversibility in asymptotic local manipulations of entanglement is extended to two-qubit systems.
Cite
@article{arxiv.quant-ph/0112131,
title = {Entanglement cost of mixed states},
author = {G. Vidal and W. Dür and J. I. Cirac},
journal= {arXiv preprint arXiv:quant-ph/0112131},
year = {2009}
}
Comments
4 pages, no figures, (v4) new results, including a new method to determine E_c for more general mixed states, presentation changed significantly