Two-way classical communication remarkably improves local distinguishability

Details Two-way classical communication remarkably improves local distinguishability Two-way classical communication remarkably improves local distinguishability

2007-08-23

arxiv.org/abs/0708.3154v2

New J. Phys. 10 (2008) 013006

Physics

Quantum Physics

26 pages, 6 figures. accepted version

Scientific paper

We analyze the difference in the local distinguishability among the following three restrictions; (i) Local operations and only one-way classical communications (one-way LOCC) are permitted. (ii) Local operations and two-way classical communications (two-way LOCC) are permitted. (iii) All separable operations are permitted. We obtain two main results concerning the discrimination between a given bipartite pure state and the completely mixed state with the condition that the given state should be detected perfectly. As the first result, we derive the optimal discrimination protocol for a bipartite pure state in the cases (i) and (iii). As the second result, by constructing a concrete two-way local discrimination protocol, it is proven that the case (ii) is much better than the case (i), i.e., two-way classical communication remarkably improves the local distinguishability in comparison with one-way classical communication at least for a low-dimensional bipartite pure state.

Affiliated with

Also associated with

No associations

Rating

Two-way classical communication remarkably improves local distinguishability 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 Two-way classical communication remarkably improves local distinguishability, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-way classical communication remarkably improves local distinguishability will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-521740