Profitable entanglement for channel discrimination
Quantum Physics
2023-10-25 v2
Abstract
We investigate the usefulness of side entanglement in discriminating between two generic qubit channels, {\ up to unitary pre- and post-processing,} and determine exact conditions under which it does enhance (as well as conditions under which it does not) the success probability. This is done in a constructive way by first analyzing the problem for channels that are extremal in the set of completely positive and trace-preserving qubit linear maps and then for channels that are inside such a set.
Cite
@article{arxiv.2211.15108,
title = {Profitable entanglement for channel discrimination},
author = {Samad Khabbazi Oskouei and Stefano Mancini and Milajiguli Rexiti},
journal= {arXiv preprint arXiv:2211.15108},
year = {2023}
}