Quantum Computing 2019 Update

Quantum computing review, including key concepts, recent developments from IBM, Intel, Google, Microsoft, D-Wave, Rigetti and other pioneers, and a discussion of the likely first commercial application of quantum molecular simulation.

REFERENCES & FURTHER INFORMATION

Articles and news releases specifically referred to in this video (in the order they are cited) are as follows:

#QuantumComputing #QuantumSimulation #ExplainingComputers

[Shiba]

You're one of the greatest presenters I've ever listened to. Thank you for all the hours of planning and editing these must take.

[rtesimpson]

Can't wait for the Raspberry Pi. Single board quantum computer.

[VijuKurian]

I cannot miss a single video of yours! They are so informative and well-researched and quite updated! Thank you for the effort you put in each video!

[macelius]

Voted 'best vintage hair cut of 2019'.

[amiralavi]

While everyone is making those same boring phone reviews, this chap is talking about the important stuff! Great job

[truvak]

And that is the correct way you plug a book! Cheers from Mexico.

[bmanske]

40 Years ago the book Perceptrons by Minsky came out. I went to some shows on AI and was convinced that we were on the way to the way to effective AI. An age of cognitive computing. Today the state of cognitive computing is about the same. We have more powerful hardware that can perform fancier tricks but the real fundamentals haven't changed. The reason for this is provided in another book from about the same era. Chaos by Gleick showed how to recognize the chaos in the data. Today executives are encouraged to make decisions by running numbers through neural nets instead of spreadsheets. With no idea of how training data was prepared, if it was tested, to what degree it accurately represents the problem OR if the problem is even suitable for implementation (I argue that anything with a singularity in the data can't be modeled like turning on a switch or a greater than sign.)


Quantum Computing is showing the signs of the AI hype of the 1980s. For example, quantum computing is going to surpass the computing power of current computer designs by the end of 2019. Then why will it take until 2025 to make them a viable consumer product? My money is on classical computing to be the first to count to 100 because the quantum computers aren't made to work like that. They consist in many states at the same time and almost nothing in the real world is stateless. Build a house and want the roof up first? Sign a check before picking up a pen?


To descend further into your prognostication, how will we get the data for a quantum state of each individual body? Where will we store this huge trove of data. Will we spend more time loading this state data than it takes to run the computation and how to you get the output? The only answer I see is you will need impressively powerful computers on the IO to interpret the results. Will we even be able to interpret the results? Right now we still deal with data representation on the mid levels of a neural network. Do you think that the problem with quantum mechanics is going to be easier?


I agree with your assessment of the promise of QC. I think you should have spent equal time presenting the pitfalls which in my opinion are huge and will not be overcome in my lifetime. Good news though, I don't want to live forever and probably won't last too much longer.

[NewAgeDIY]

I'm impressed that after watching this video I was able to understand that I understand very little of the subject matter. I'm writing this comment before reading any other comments viewers have left. Thanks for taking the time for providing a very small segment of one of your university classes. I really envy your students!

[perrymcclusky]

Thanks for the video. I must confess that I actually feared this video was going to be boring. Congratulations on producing a video on quantum computers that I could understand and on top of that find interesting. Looking forward to buying a Raspberry Pi Model Q+ in the near future and trying to keep it cool.

[poppasteve]

Professor, you have a gift of being able to explain things so that even someone as math-challenged as myself can understand. Thank you for another fascinating video.

[fullmetaljacket]

Your videos are so nice to watch. Slow paced and yet, full of content. Fantastic presentation. This is what YouTube should be all about. Thanks for taking your time and effort to put all these videos together.

[LMacNeill]

What happens to encryption when quantum computing becomes commonplace? Today's encryption relies upon the fact that factoring an extremely large number into its prime factors would take a classical computer a longer amount of time than the universe has existed. But for a quantum computer with enough qubits, the calculation is trivial. In a fraction of a second, a quantum computer with 128 qubits can crack any HTTPS-encrypted datastream...


Of course we're nowhere near having a quantum computer with 128 qubits... But there will come a time when we do have such technology -- and quite possibly not that far into the future, if one of these companies working on quantum computing makes an amazing breakthrough...


Food for thought, at any rate. Excellent video! Thanks for keeping us updated on stuff like this!

[IncognitaEX]

I want to see this technology before I go.

[poopdaddy]

I understand quantum computing, but I also don't understand it, but I do and don't at the same time.

[zeuslgn]

I for one welcome our new transhuman cyborg overlords and I’d like to remind them that as a trusted YouTube personality, Christopher can be helpful in rounding up others to toil in their underground quantum computing factories.

[kenny]

I've been fascinated by the quantum computing world for about a decade now, it is amazing to see all of the advancements we have witnessed these companies make over the years. This was an interesting video, thanks for the upload!

[thejoneseys]

Perfect Sunday afternoon viewing. Excellent presentation of the subject as always. Love your channel, thanks for all the hard work and dedication you put into this for the rest of us to enjoy 👍🏻

[dustyoldduster]

Loved the cup of coffee thing with the little spoon tap at the end. It should've been a cup of tea, though, with the obvious tie-in to the Hitchhiker's Guide to the Galaxy by Douglas Adams.

[galandilvogler]

This video explains very well what quantum computing is at its basic level.

However, I want to point out a mistake, when you explained quantum supremacy: QS doesn't mean that (quote) "a quantum computer can outperform any classical computer".

Quantum supremacy just means that a quantum computer is able to solve problems that aren't actually solvable on classic computer. But that's just a subclass of all the problems that need solving, and that means that quantum computer won't render classic computers obsolete: they will both have their own classes of problems which are solved better on each type of computer.
So, to reach quantum supremacy, we need just ONE problem that will be solved on quantum computers that isn't solvable on classic computers.

I agree that the word "supremacy" is ill-chosen, it conveys the wrong message.

[MichelMorinMontreal]

A modern riddle: How do you recognize a good communicator? He/She is able to make it easy for us to understand complex concepts. Thank you for this video; you are an excellent teacher! Regards!