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Journal Article

Entanglement cost of bipartite mixed states


Cirac,  J. Ignacio
Theory, Max Planck Institute of Quantum Optics, Max Planck Society;

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Vidal, G., Dür, W., & Cirac, J. I. (2002). Entanglement cost of bipartite mixed states. Physical Review Letters, 89(2): 027901. 027901. Retrieved from http://link.aps.org/abstract/PRL/v89/e027901.

Cite as: https://hdl.handle.net/11858/00-001M-0000-000F-C1F8-5
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.