2026-04-17T04:04:48Zhttps://recercat.cat/oai/request
oai:recercat.cat:2117/3461232026-01-30T02:01:47Zcom_2072_1033col_2072_452950
RECERCAT author Rodrigo Muñoz, Santiago author Bandic, Medina author Abadal Cavallé, Sergi author van Someren, Hans author Alarcón Cot, Eduardo José author García Almudéver, Carmen 2021 In the quest of large-scale quantum computers, multi-core distributed architectures are considered a compelling alternative to be explored. A crucial aspect in such approach is the stringent demand on communication among cores when qubits need to interact, which conditions the scalability potential of these architectures. In this work, we address the question of how the cost of the communication among cores impacts on the viability of the quantum multi-core approach. Methodologically, we consider a design space in which architectural variables (number of cores, number of qubits per core), application variables for several quantum benchmarks (number of qubits, number of gates, percentage of two-qubit gates) and inter-core communication latency are swept along with the definition of a figure of merit. This approach yields both a qualitative understanding of trends in the design space and companion dimensioning guidelines for the architecture, including optimal points, as well as quantitative answers to the question of beyond which communication performance levels the multi-core architecture pays off. Our results allow to determine the thresholds for inter-core communication latency in order for multi-core architectures to outperform single-core quantum processors.Peer ReviewedPostprint (author's final draft) Open Access Àrees temàtiques de la UPC::Informàtica::Arquitectura de computadors::Arquitectures distribuïdes Quantum computers Quantum computing Many-core quantum computers Quantum communications Design space exploration Quantum computers scalability Ordinadors quàntics Scaling of multi-core quantum architectures: a communications-aware structured gap analysis Conference report