Entanglement cost of mixed states

Details Entanglement cost of mixed states Entanglement cost of mixed states

2001-12-21

arxiv.org/abs/quant-ph/0112131v4

Phys. Rev. Lett. 89, 027901 (2002)

Physics

Quantum Physics

4 pages, no figures, (v4) new results, including a new method to determine E_c for more general mixed states, presentation cha

Scientific paper

10.1103/PhysRevLett.89.027901

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.

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