



@article {1439,
	title = {Non-Additivity of the Entanglement of Purification (Beyond Reasonable  Doubt)
},
	year = {2012},
	month = {2012/06/06},
	abstract = {  We demonstrate the convexity of the difference between the regularized
entanglement of purification and the entropy, as a function of the state. This
is proved by means of a new asymptotic protocol to prepare a state from
pre-shared entanglement and by local operations only. We go on to employ this
convexity property in an investigation of the additivity of the (single-copy)
entanglement of purification: using numerical results for two-qubit Werner
states we find strong evidence that the entanglement of purification is
different from its regularization, hence that entanglement of purification is
not additive.
},
	url = {http://arxiv.org/abs/1206.1307v1},
	author = {Jianxin Chen and Andreas Winter}
}
