Trade-off coding for universal qudit cloners motivated by the Unruh effect

Details Trade-off coding for universal qudit cloners motivated by the Unruh effect Trade-off coding for universal qudit cloners motivated by the Unruh effect

2011-03-01

arxiv.org/abs/1103.0286v2

Journal of Physics A: Mathematical and Theoretical 44, 415306 (2011)

Physics

Quantum Physics

26 pages, 4 figures; v2 has minor corrections to Definition 2. Definition 4 and Remark 5 have been added

Scientific paper

10.1088/1751-8113/44/41/415306

A "triple trade-off" capacity region of a noisy quantum channel provides a more complete description of its capabilities than does a single capacity formula. However, few full descriptions of a channel's ability have been given due to the difficult nature of the calculation of such regions---it may demand an optimization of information-theoretic quantities over an infinite number of channel uses. This work analyzes the d-dimensional Unruh channel, a noisy quantum channel which emerges in relativistic quantum information theory. We show that this channel belongs to the class of quantum channels whose capacity region requires an optimization over a single channel use, and as such is tractable. We determine two triple-trade off regions, the quantum dynamic capacity region and the private dynamic capacity region, of the d-dimensional Unruh channel. Our results show that the set of achievable rate triples using this coding strategy is larger than the set achieved using a time-sharing strategy. Furthermore, we prove that the Unruh channel has a distinct structure made up of universal qudit cloning channels, thus providing a clear relationship between this relativistic channel and the process of stimulated emission present in quantum optical amplifiers.

Affiliated with

Also associated with

No associations

Rating

Trade-off coding for universal qudit cloners motivated by the Unruh effect 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 Trade-off coding for universal qudit cloners motivated by the Unruh effect, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Trade-off coding for universal qudit cloners motivated by the Unruh effect will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-472222