2026-04-18T02:14:00Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/3461232026-01-30T02:01:47Zcom_2072_1033col_2072_452950

Scaling of multi-core quantum architectures: a communications-aware structured gap analysis Rodrigo Muñoz, Santiago Bandic, Medina Abadal Cavallé, Sergi van Someren, Hans Alarcón Cot, Eduardo José García Almudéver, Carmen Universitat Politècnica de Catalunya. Doctorat en Arquitectura de Computadors Universitat Politècnica de Catalunya. Departament d'Arquitectura de Computadors Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica Universitat Politècnica de Catalunya. CBA - Sistemes de Comunicacions i Arquitectures de Banda Ampla Universitat Politècnica de Catalunya. EPIC - Energy Processing and Integrated Circuits 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 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 Reviewed Postprint (author's final draft) 2021 Conference report Rodrigo, S. [et al.]. Scaling of multi-core quantum architectures: a communications-aware structured gap analysis. A: ACM International Conference on Computing Frontiers. "Proceedings of the 18th ACM International Conference on Computing Frontiers 2021 (CF 2021): May 11-May 13, 2021, virtual conference, Italy". New York: Association for Computing Machinery (ACM), 2021, p. 144-151. ISBN 978-1-4503-8404-9. DOI 10.1145/3457388.3458674. 978-1-4503-8404-9 https://hdl.handle.net/2117/346123 10.1145/3457388.3458674 eng https://dl.acm.org/doi/10.1145/3457388.3458674 Open Access 8 p. application/pdf Association for Computing Machinery (ACM)