Classical Feedback in a Quantum Network
Quantum Physics
2026-02-20 v2 Information Theory
math.IT
Abstract
Communication over a quantum multiple access channel (MAC) is considered with classical feedback. Since the no-cloning prohibits universal copying of arbitrary quantum states, classical feedback is generated through measurement. An achievable rate region is derived using partial information decoding at each transmitter. Our region generalizes both the classical Cover-Leung region and the generalized feedback region. As an example, we show that the qubit SWAP channel can benefit from feedback.
Cite
@article{arxiv.2509.16333,
title = {Classical Feedback in a Quantum Network},
author = {Elina Levi and Uzi Pereg},
journal= {arXiv preprint arXiv:2509.16333},
year = {2026}
}