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dc.contributor.author
Bäumer, Elisa
dc.contributor.author
Gisin, Nicolas
dc.contributor.author
Tavakoli, Armin
dc.date.accessioned
2021-08-05T07:13:09Z
dc.date.available
2021-08-05T03:16:08Z
dc.date.available
2021-08-05T07:10:58Z
dc.date.available
2021-08-05T07:13:09Z
dc.date.issued
2021-07-22
dc.identifier.issn
2056-6387
dc.identifier.other
10.1038/s41534-021-00450-x
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/499577
dc.identifier.doi
10.3929/ethz-b-000499577
dc.description.abstract
Increasingly sophisticated quantum computers motivate the exploration of their abilities in certifying genuine quantum phenomena. Here, we demonstrate the power of state-of-the-art IBM quantum computers in correlation experiments inspired by quantum networks. Our experiments feature up to 12 qubits and require the implementation of paradigmatic Bell-State Measurements for scalable entanglement-swapping. First, we demonstrate quantum correlations that defy classical models in up to nine-qubit systems while only assuming that the quantum computer operates on qubits. Harvesting these quantum advantages, we are able to certify 82 basis elements as entangled in a 512-outcome measurement. Then, we relax the qubit assumption and consider quantum nonlocality in a scenario with multiple independent entangled states arranged in a star configuration. We report quantum violations of source-independent Bell inequalities for up to ten qubits. Our results demonstrate the ability of quantum computers to outperform classical limitations and certify scalable entangled measurements.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Nature Publishing Group
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Quantum information
en_US
dc.subject
Qubits
en_US
dc.title
Demonstrating the power of quantum computers, certification of highly entangled measurements and scalable quantum nonlocality
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
ethz.journal.title
npj Quantum Information
ethz.journal.volume
7
en_US
ethz.journal.issue
1
en_US
ethz.journal.abbreviated
npj Quantum Inf
ethz.pages.start
117
en_US
ethz.size
6 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
Information-theoretic limits to time measurements
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
London
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::02511 - Institut für Theoretische Physik / Institute for Theoretical Physics::03781 - Renner, Renato / Renner, Renato
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::02511 - Institut für Theoretische Physik / Institute for Theoretical Physics::03781 - Renner, Renato / Renner, Renato
ethz.grant.agreementno
188541
ethz.grant.fundername
SNF
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.program
Projekte MINT
ethz.date.deposited
2021-08-05T03:16:18Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-08-05T07:11:03Z
ethz.rosetta.lastUpdated
2022-03-29T10:56:42Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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