The decreasing property of relative entropy and the strong superadditivity of quantum channels

Details The decreasing property of relative entropy and the strong superadditivity of quantum channels The decreasing property of relative entropy and the strong superadditivity of quantum channels

2008-03-04

arxiv.org/abs/0803.0452v2

Quantum Information and Computation 7 (2009) 594-609

Physics

Quantum Physics

9 pages, the error in the first version is corrected

Scientific paper

We argue that a fundamental (conjectured) property of memoryless quantum channels, namely the strong superadditivity, is intimately related to the decreasing property of the quantum relative entropy. Using the latter we first give, for a wide class of input states, an estimation of the output entropy for phase damping channels and some Weyl quantum channels. Then we prove, without any input restriction, the strong superadditivity for several quantum channels, including depolarizing quantum channels, quantum-classical channels and quantum erasure channels.

Affiliated with

Also associated with

No associations

Rating

The decreasing property of relative entropy and the strong superadditivity of quantum channels does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The decreasing property of relative entropy and the strong superadditivity of quantum channels, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The decreasing property of relative entropy and the strong superadditivity of quantum channels will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-406322