Yet another additivity conjecture

Details Yet another additivity conjecture Yet another additivity conjecture

2005-06-07

arxiv.org/abs/quant-ph/0506052v2

Physics

Quantum Physics

corrections of typo, etc. minor revision

Scientific paper

10.1016/j.physleta.2005.10.028

It is known that the additivity conjecture of Holevo capacity, output minimum entoropy, and the entanglement of formation (EoF), are equivalent with each other. Among them, the output minimum entropy is simplest, and hence many researchers are focusing on this quantity. Here, we suggest yet another entanglement measure, whose strong superadditivity and additivity are equivalent to the additivity of the quantities mentioned above. This quantity is as simple as the output minimum entropy, and in existing proofs of additivity conjecture of the output minimum entropy for the specific examples, they are essentially proving the strong superadditivity of this quantity.

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