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the claim

Working quantum computers already exist and have been built by companies including IBM and Google.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
7 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that working quantum computers already exist and have been built by companies including IBM and Google?

Yes. A peer-reviewed overview states that Google built a quantum computer exceeding 50 qubits and demonstrated quantum supremacy in 2019, and that IBM and Google are among the major companies developing quantum devices. Other sources confirm Google and IBM have built quantum chips and are racing to develop quantum computers, though several frame practical machines as still emerging.

Verdict: SUPPORTED · 7 sources for, 0 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 7
At the Forefront of Quantum Computing: From Japan-made Quantum Computers to Global Cutting-Edge
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At the Forefront of Quantum Computing: From Japan-made Quantum Computers to Global Cutting-Edge. (n.d.). cir.nii.ac.jp. https://doi.org/10.14886/jvss.2025.0_2a03

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More for · 6
Investigation of Early-Stage Breast Cancer Detection Using Quantum Neural Network
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Investigation of Early-Stage Breast Cancer Detection Using Quantum Neural Network. (n.d.). cir.nii.ac.jp. https://doi.org/10.20944/preprints202210.0208.v1

Roadmap to Talking Quantum Movies: a Contingent Inquiry
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Roadmap to Talking Quantum Movies: a Contingent Inquiry. (n.d.). cir.nii.ac.jp. https://doi.org/10.1109/access.2018.2871107

Experience Teaching Quantum Computing
2019
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C., T. C., I., F. R., Istvan, B., M., L. A., Daniel, E., & Lewis, W. (2019). Experience Teaching Quantum Computing. eric.ed.gov. https://eric.ed.gov/?id=ED597112

Roundtable Discussion III: The Development and Uses of Artificial Intelligence in Medicine: A Work in Progress
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Roundtable Discussion III: The Development and Uses of Artificial Intelligence in Medicine: A Work in Progress. (n.d.). cir.nii.ac.jp. https://doi.org/10.1177/2470289719898701

Piloting a Full-Year, Optics-Based High School Course on Quantum Computing
2022
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A., W. J., Mic, F., L., T. D., Catherine, R., & R., L. C. B. (2022). Piloting a Full-Year, Optics-Based High School Course on Quantum Computing. eric.ed.gov. https://doi.org/10.1088/1361-6552/ac3dc2

Quantum circuit optimizations for NISQ architectures
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Quantum circuit optimizations for NISQ architectures. (n.d.). cir.nii.ac.jp. https://doi.org/10.1088/2058-9565/ab79b1

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