Tight lower bound to the geometric measure of quantum discord

Details Tight lower bound to the geometric measure of quantum discord Tight lower bound to the geometric measure of quantum discord

2010-10-10

arxiv.org/abs/1010.1920v3

Physics

Quantum Physics

10 pages,2 figures. In the previous versions, a constraint was ignored while optimizing the second term in Eq.(5), in which ca

Scientific paper

Dakic, Vedral and Brukner [Physical Review Letters \tf{105},190502 (2010)] gave a geometric measure of quantum discord in a bipartite quantum state as the distance of the state from the closest classical quantum (or zero discord) state and derived an explicit formula for a two qubit state. Further, S.Luo and S.Fu [Physical Review A \tf{82}, 034302 (2010)] obtained a generic form of this geometric measure for a general bipartite state and established a lower bound. In this brief report we obtain a rigorous lower bound to the geometric measure of quantum discord in a general bipartite state which dominates that obtained by S.Luo and S.Fu.

Affiliated with

Also associated with

No associations

Rating

Tight lower bound to the geometric measure of quantum discord 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 Tight lower bound to the geometric measure of quantum discord, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tight lower bound to the geometric measure of quantum discord will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-88146