Additive invariants on quantum channels and applications to regularized minimum entropy
Abstract
Description
We introduce two additive invariants of output quantum channels. If the value of one these invariants is less than 1 then the logarithm of the inverse of its value is a positive lower bound for the regularized minimum entropy of an output quantum channel. We give a few examples in which one of these invariants is less than 1. We also study the special cases where the above both invariants are equal to 1.
14 pages, a few typo corrections
14 pages, a few typo corrections