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      CommentAuthorgoatcheez
    • CommentTimeAug 19th 2019
     
    Last year, China had nearly twice as many patent filings as the United States for quantum technology overall, a category that includes communications and cryptology devices, according to market research firm Patinformatics. The United States, though, leads the world in patents relating to the most prized segment of the field - quantum computers - thanks to heavy investment by IBM, Google, Microsoft and others.

    The quantum revolution is coming, and Chinese scientists are at the forefront
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    https://www.youtube.com/watch?v=GKnfVA1v5ow
    Quantum Supremacy: What is it and what does it mean?
    Sabine knows.
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      CommentAuthorTrim
    • CommentTimeSep 8th 2019
     
    Scientists couple magnetization to superconductivity for quantum discoveries.

    https://www.technology.org/2019/09/06/scientists-couple-magnetization-to-superconductivity-for-quantum-discoveries/
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      CommentAuthorAngus
    • CommentTimeSep 9th 2019
     
    Posted By: Andrew Palfreymanhttps://www.youtube.com/watch?v=GKnfVA1v5ow
    Quantum Supremacy: What is it and what does it mean?


    Discreet dominance
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      CommentAuthorTrim
    • CommentTimeSep 20th 2019
     
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      CommentAuthorTrim
    • CommentTimeOct 10th 2019
     
    Researchers discover material that could someday power quantum computer.

    https://phys.org/news/2019-10-material-power-quantum.html
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      CommentAuthoralsetalokin
    • CommentTimeOct 10th 2019 edited
     
    Cheese?

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      CommentAuthorgoatcheez
    • CommentTimeOct 10th 2019 edited
     
    Charming but strange, up and down, from bottom to the top and back again.
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      CommentAuthorgoatcheez
    • CommentTimeOct 23rd 2019 edited
     
    Google confirms ‘quantum supremacy’ breakthrough https://youtu.be/-ZNEzzDcllU
    Google has officially announced that it’s achieved quantum supremacy in a new article published in the scientific journal Nature. The announcement comes exactly one month after it initially leaked, when Google’s paper was accidentally published early. Now, however, it’s official, meaning the full details of the research are public, and the broader scientific community can fully scrutinize what Google says it’s achieved.

    Google says that its 54-qubit Sycamore processor was able to perform a calculation in 200 seconds that would have taken the world’s most powerful supercomputer 10,000 years.

    https://www.theverge.com/2019/10/23/20928294/google-quantum-supremacy-sycamore-computer-qubit-milestone
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    I for one welcome our quantum overlords.
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      CommentAuthorTrim
    • CommentTimeOct 24th 2019 edited
     
    New scientist.

    It has been a bit of a bumpy start, but a new era of computing seems to be here. Researchers at Google claim their quantum computer has solved a problem that would take even the very best conventional machine thousands of years to crack.

    The milestone, known as quantum supremacy, represents a long-sought stride towards realising the immense promise of quantum computers, devices that exploit the strange properties of quantum physics to speed up certain calculations.

    “This is a wonderful achievement. The engineering here is just phenomenal,” says Peter Knight, a physicist at Imperial College London. “It shows that quantum computing is really hard but not impossible. It is a stepping stone toward a big dream.”


    The paper outlining the work, published in the journal Nature this morning, comes a month after a draft was unintentionally posted on a NASA server. It demonstrates that a quantum processor consisting of 54 superconducting quantum bits, or qubits, was able to perform a random sampling calculation – essentially verifying that a set of numbers is randomly distributed – exponentially faster than any standard computer.

    Google’s Sycamore device did it in just 3 minutes and 20 seconds, although one of the qubits had to be turned off as it wasn’t working properly.

    The latest version of the paper appears to contain no significant changes from the leaked one. For instance, it stands by the claims that the calculation would have taken IBM’s Summit, the world’s most powerful supercomputer, some 10,000 years.

    Read more: IBM says Google may not have reached quantum supremacy after all
    IBM has already pushed back on that claim, insisting that with some clever classical programming, its machine can solve the problem in 2.5 days. Indeed, IBM, which has its own 53-qubit quantum computer, prefers a higher threshold for quantum supremacy, which explains its argument that Google has not yet reached the milestone.

    But such caveats should not detract too much from Google’s achievement, says Knight: “There are always going to be clever ways to tweak classical algorithms, but until we’ve had a chance to digest the methodology IBM are proposing, it is hard to judge.”

    We will see more of this sort of back and forth when it comes to claims of quantum supremacy, says Knight. “That’s what we expect in any scientific endeavour,” he says. “We always challenge things, and this is such an important development that, of course, we have to poke all of the assumptions.”

    Even if you accept IBM’s claims at face value, Google’s quantum computer is still a big step forward, says Ciarán Gilligan-Lee at University College London.

    “IBM is claiming that, even when running the world’s largest computer for two and half days, and running petabytes of memory, they can simulate what the quantum chip does in 200 seconds. When you put it into context, it is still a pretty impressive achievement.”

    It doesn’t mean quantum computers are ready to tackle real-world problems though – that remains decades away. Instead, it is a proof of concept. “But it is the first baby step on a long road to getting useful quantum computers,” says Gilligan-Lee.

    He is looking forward to the next milestone: proof that we have sufficient control over the qubits that we can overcome the small errors they accumulate during calculations.

    “We are now in a phase we call noisy intermediate-scale quantum computing, or NISQ,” he says. “To get beyond that, we need to start doing error correction. The nice thing is that we can see from this paper that the architecture of the Google chip is already optimised for that.”



    Read more: https://www.newscientist.com/article/2220968-its-official-google-has-achieved-quantum-supremacy/#ixzz63GnXLM4P
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      CommentAuthorTrim
    • CommentTimeNov 9th 2019
     
    A new quantum data classification protocol brings us nearer to a future 'quantum internet'.

    https://phys.org/news/2019-11-quantum-classification-protocol-nearer-future.html
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      CommentAuthorTrim
    • CommentTimeDec 3rd 2019
     
    RESEARCHERS DISCOVER NEW WAY TO SPLIT AND SUM PHOTONS WITH SILICON.

    https://revolution-green.com/researchers-discover-new-way-split-sum-photons-silicon/
    • CommentAuthorAsterix
    • CommentTimeDec 3rd 2019
     
    You can split a photon? How does that work?
    • CommentAuthorBigOilRep
    • CommentTimeDec 3rd 2019 edited
     
    1. Take a ripe photon
    2. Take a very sharp knife
    3. Gripping the photon with index finger and thumb, carefully slice the photon down the middle, following the seam.
    4. Throw the photon into the pan with the other ingredients

    *Always wash your hands after handling photons.*
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      CommentAuthorAngus
    • CommentTimeDec 3rd 2019 edited
     
    Posted By: AsterixYou can split a photon? How does that work?

    https://en.wikipedia.org/wiki/Optical_parametric_amplifier
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    It works so long as you don't look at it
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      CommentAuthorAngus
    • CommentTimeDec 3rd 2019 edited
     
    It works just fine and is much used in modern optical technology. Potentially including some of the crazy ideas for lightsail propulsion.

    You can look at the result, but you can't peer at the inner workings.