Physics – Mathematical Physics
Scientific paper
2011-02-15
Physics
Mathematical Physics
15 pages, 4 figures; to be presented at TQC2011, Madrid, May 2011. V2: New proof of Theorem 4. Section added on telescoping th
Scientific paper
We introduce the telescopic relative entropy (TRE), which is a new regularisation of the relative entropy related to smoothing, to overcome the problem that the relative entropy between pure states is either zero or infinity and therefore useless as a distance measure in this case. We study basic properties of this quantity, and find interesting relationships between the TRE and the trace norm distance. We then exploit the same techniques to obtain a new and shorter proof of a lower bound on the relative Renyi entropies in terms of the trace norm distance, $\trace\rho^{1-p}\sigma^p \ge 1-(||\rho-\sigma||_1)/2$.
No associations
LandOfFree
Telescopic Relative Entropy 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 Telescopic Relative Entropy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Telescopic Relative Entropy will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-378313