Scaling of multi-core quantum architectures: A communications-aware structured gap analysis

Santiago Rodrigo, Medina Bandic, Sergi Abadal, Hans Van Someren, Eduard Alarcón, Carmen G. Almudéver

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

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.

Original languageEnglish
Title of host publicationProceedings of the 18th ACM International Conference on Computing Frontiers 2021, CF 2021
PublisherAssociation for Computing Machinery (ACM)
Pages144-151
ISBN (Electronic)9781450384049
DOIs
Publication statusPublished - 2021
Event18th ACM International Conference on Computing Frontiers 2021, CF 2021 - Virtual, Online, Italy
Duration: 11 May 202113 May 2021

Publication series

NameProceedings of the 18th ACM International Conference on Computing Frontiers 2021, CF 2021

Conference

Conference18th ACM International Conference on Computing Frontiers 2021, CF 2021
CountryItaly
CityVirtual, Online
Period11/05/2113/05/21

Keywords

  • design space exploration
  • many-core quantum computers
  • quantum communications
  • quantum computers scalability
  • quantum computing

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