Quantum Strategies to Overcome Classical Multiplexing Limits
Abstract
Near-term quantum networks face a bottleneck due to low quantum communication rates. This degrades performance both by lowering operating speeds and increasing qubit storage time in noisy memories, making some quantum internet applications infeasible. One way to circumvent this bottleneck is multiplexing: combining multiple signals into a single signal to improve the overall rate. Standard multiplexing techniques are classical in that they do not make use of coherence between quantum channels nor account for decoherence rates that vary during a protocol's execution. In this paper, we first derive semiclassical limits to multiplexing for many-qubit protocols, and then introduce two techniques: single click quantum multiplexing and multi-server multiplexing. These can enable beyond-classical multiplexing advantages. We illustrate these techniques through three example applications: 1) entanglement generation between two asymetric quantum network nodes (i.e., repeaters or quantum servers with inequal memories), 2) remote state preparation between many end user devices and a single quantum node, and 3) remote state preparation between one end user device and many internetworked quantum nodes. By utilizing many noisy internetworked quantum devices instead of fewer low-noise devices, our multiplexing strategies enable new paths towards achieving high-speed many-qubit quantum network applications.
Cite
@article{arxiv.2510.06099,
title = {Quantum Strategies to Overcome Classical Multiplexing Limits},
author = {Tzula B. Propp and Jeroen Grimbergen and Emil R. Hellebek and Junior R. Gonzales-Ureta and Janice van Dam and Joshua A. Slater and Anders S. Sørensen and Stephanie D. C. Wehner},
journal= {arXiv preprint arXiv:2510.06099},
year = {2026}
}