Deterministic Multi-User Identification over Bosonic Channels
Quantum Physics
2026-04-28 v1 Information Theory
math.IT
Abstract
We study deterministic multi-user identification over bosonic channels using coherent-state signatures. Each user is assigned a coherent product state under an average energy constraint, and identification is performed by a user-specific binary quantum test. In contrast to classical multi-user identification models based on shared codebooks, this formulation associates each receiver with a geometric signature in high-dimensional phase space. Using metric entropy bounds, we show that the identification capacity exhibits a near-k log k scaling behavior.
Cite
@article{arxiv.2604.22804,
title = {Deterministic Multi-User Identification over Bosonic Channels},
author = {Gökhan Elmas and Janis Nötzel},
journal= {arXiv preprint arXiv:2604.22804},
year = {2026}
}