Cross-platform comparison of arbitrary quantum states.

Journal Article (Journal Article)

As we approach the era of quantum advantage, when quantum computers (QCs) can outperform any classical computer on particular tasks, there remains the difficult challenge of how to validate their performance. While algorithmic success can be easily verified in some instances such as number factoring or oracular algorithms, these approaches only provide pass/fail information of executing specific tasks for a single QC. On the other hand, a comparison between different QCs preparing nominally the same arbitrary circuit provides an insight for generic validation: a quantum computation is only as valid as the agreement between the results produced on different QCs. Such an approach is also at the heart of evaluating metrological standards such as disparate atomic clocks. In this paper, we report a cross-platform QC comparison using randomized and correlated measurements that results in a wealth of information on the QC systems. We execute several quantum circuits on widely different physical QC platforms and analyze the cross-platform state fidelities.

Full Text

Duke Authors

Cited Authors

  • Zhu, D; Cian, ZP; Noel, C; Risinger, A; Biswas, D; Egan, L; Zhu, Y; Green, AM; Alderete, CH; Nguyen, NH; Wang, Q; Maksymov, A; Nam, Y; Cetina, M; Linke, NM; Hafezi, M; Monroe, C

Published Date

  • November 2022

Published In

Volume / Issue

  • 13 / 1

Start / End Page

  • 6620 -

PubMed ID

  • 36333309

Pubmed Central ID

  • PMC9636372

Electronic International Standard Serial Number (EISSN)

  • 2041-1723

International Standard Serial Number (ISSN)

  • 2041-1723

Digital Object Identifier (DOI)

  • 10.1038/s41467-022-34279-5


  • eng