Local discrimination of mixed states

Details Local discrimination of mixed states Local discrimination of mixed states

2010-04-30

arxiv.org/abs/1004.5522v1

Phys. Rev. Lett. 105, 080504 (2010)

Physics

Quantum Physics

4 pages, 2 figures+ supplementary material

Scientific paper

10.1103/PhysRevLett.105.080504

We provide rigorous, efficiently computable and tight bounds on the average error probability of multiple-copy discrimination between qubit mixed states by Local Operations assisted with Classical Communication (LOCC). In contrast to the pure-state case, these experimentally feasible protocols perform strictly worse than the general collective ones. Our numerical results indicate that the gap between LOCC and collective error rates persists in the asymptotic limit. In order for LOCC and collective protocols to achieve the same accuracy, the former requires up to twice the number of copies of the latter. Our techniques can be used to bound the power of LOCC strategies in other similar settings, which is still one of the most elusive questions in quantum communication.

Affiliated with

Also associated with

No associations

Rating

Local discrimination of mixed states 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 Local discrimination of mixed states, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Local discrimination of mixed states will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-388109