Entanglement cost of bipartite mixed states |
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Authors: | Vidal G Dür W Cirac J I |
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Institution: | Institute for Quantum Information, California Institute of Technology, Pasadena, California 91125, USA. |
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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. |
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