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Thread: Who has the most powerful quantum computer in the world?

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    Veteran Member Rafael Passoni's Avatar
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    Default Who has the most powerful quantum computer in the world?

    Edited: The last one I have seen was several times faster than IBM Summit.
    Last edited by Rafael Passoni; 05-06-2021 at 09:46 PM.
    Spoiler!

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    the Albanians, eot

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    Quote Originally Posted by Rafael Passoni View Post
    The last one I have seen was 100 trillion times faster than IBM Summit.
    IBM, Google, Microsoft etc... FAIL !

    Quantum circuits with many photons on a programmable nanophotonic chip


    Abstract
    Growing interest in quantum computing for practical applications has led to a surge in the availability of programmable machines for executing quantum algorithms1,2. Present-day photonic quantum computers3,4,5,6,7 have been limited either to non-deterministic operation, low photon numbers and rates, or fixed random gate sequences. Here we introduce a full-stack hardware−software system for executing many-photon quantum circuit operations using integrated nanophotonics: a programmable chip, operating at room temperature and interfaced with a fully automated control system. The system enables remote users to execute quantum algorithms that require up to eight modes of strongly squeezed vacuum initialized as two-mode squeezed states in single temporal modes, a fully general and programmable four-mode interferometer, and photon number-resolving readout on all outputs. Detection of multi-photon events with photon numbers and rates exceeding any previous programmable quantum optical demonstration is made possible by strong squeezing and high sampling rates. We verify the non-classicality of the device output, and use the platform to carry out proof-of-principle demonstrations of three quantum algorithms: Gaussian boson sampling, molecular vibronic spectra and graph similarity8. These demonstrations validate the platform as a launchpad for scaling photonic technologies for quantum information processing.

    https://www.nature.com/articles/s41586-021-03202-1

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