Quasi-inversion of quantum and classical channels in finite dimensions
Quantum Physics
2021-08-11 v3
Abstract
We introduce the concept of quasi-inverse of quantum and classical channels, prove general properties of these inverses and determine them for a large class of channels acting in an arbitrary finite dimension. Therefore we extend the previous results of [1] to arbitrary dimensional channels and to the classical domain. We demonstrate how application of the proposed scheme can increase on the average the fidelity between a given random pure state and its image transformed by the quantum channel followed by its quasi-inversion.
Keywords
Cite
@article{arxiv.2104.06062,
title = {Quasi-inversion of quantum and classical channels in finite dimensions},
author = {Fereshte Shahbeigi and Koorosh Sadri and Morteza Moradi and Karol Życzkowski and Vahid Karimipour},
journal= {arXiv preprint arXiv:2104.06062},
year = {2021}
}
Comments
39 pages, 10 figures