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Conditions for a class of entanglement transformations

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arxiv quant-ph/9811053 v2 pith:YKLSPOHQ submitted 1998-11-20 quant-ph

Conditions for a class of entanglement transformations

classification quant-ph
keywords entanglementconditionsalicepossiblequantumstatesystemsalgebraic
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Suppose Alice and Bob jointly possess a pure state, $|\psi\ra$. Using local operations on their respective systems and classical communication it may be possible for Alice and Bob to transform $|\psi\ra$ into another joint state $|\phi\ra$. This Letter gives necessary and sufficient conditions for this process of entanglement transformation to be possible. These conditions reveal a partial ordering on the entangled states, and connect quantum entanglement to the algebraic theory of majorization. As a consequence, we find that there exist essentially different types of entanglement for bipartite quantum systems.

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Cited by 4 Pith papers

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