Tuesday, July 23, 2013

1209.0058 (Xueyuan Hu et al.)

Super-additivity of quantum-correlating power    [PDF]

Xueyuan Hu, Heng Fan, D. L. Zhou, Wu-Ming Liu
We prove that, when two local quantum channels are used paralleled, the quantum-correlating power (QCP) of the composed channel is no less than the sum of QCP of the two channels. For local channels with zero QCP, the super-activation of QCP is a fairly common effect, and proved to exist except for the trivial case where both of the channels are completely decohering channels or unitary operators. For general quantum channels, we show that the (not-so-common) additivity of QCP can be observed for the situation where a measuring-and-preparing channel is used together with a completely decohering channel.
View original: http://arxiv.org/abs/1209.0058

No comments:

Post a Comment