Quantum Computing: A Primer

An animated explanation of superposition, entanglement, and the bizarre properites of computing's next great jump forward

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Quantum computing may well represent the biggest breakthrough in computer technology since the invention of the microprocessor. Taking advantage of bizarre effects like quantum superposition and quantum entanglement, quantum computers have the potential to unlock massive amounts of processing power, and to solve problems that would take conventional computers literally centuries. You could spend centuries trying to master the intricacies of quantum physics … or you could watch this video, which explains it all in about two minutes.

 

Still want more? Get comfortable for a deep dive into the consequences of a world where quantum computing can crack the hardest encryptions in seconds and what happens when such power falls into the wrong hands.

21 comments
bellajj2009
bellajj2009

With quantum processors we will eventually be able to accomplish some incredible things, like even run computer simulated universes that are indistinguishable from our own “real” universe, complete with simulated minds. And there is a cool new book that discusses the implications of quantum computers in general (i.e., “On Computer Simulated Universes”).  I think we are on the verge of a technological revolution.

Rajpal
Rajpal

The assumption that the an electron-spin qubit can be both spin-up and spin-down at the same time is based on an INCORRECT concept of “What is Electron Spin?” http://vixra.org/pdf/1306.0141v2.pdf  

Bitflogger
Bitflogger

I don't know much about this.  Does this seem like magic?  Magic is not science.

JagdPanther
JagdPanther

This will be able to change sooooo many thing sooooo very quickly. If it actually works. But I think it does, or they would only sell one, maybe two if they were lucky. So prepare for things to change a lot in the future.  

Idiomatic
Idiomatic

This is amazing to know this and I am sure that this thing is going to change the world. Same, this is how human created the history. I am keen to buy one Quantum Computer.

Lilly, UK

http://idioms.in/

iamhe
iamhe

In my opinion the real world value of entangled Q bits aren't even being discussed.


iamhe
iamhe

We must remember the Human World of Mythology, in that world, in our present age, and for many years now, there has been developing The Mystical Marvelous Magical Machine Myth, The Giant Electronic Intelligence, faster than the speed of light, able to know everything, and predict the unpredictable.


I have watched the Myth develop, and be assigned to ever new generations of computers.....


Super Computers, have been the chosen machines for tens of years now..... always there is the fastest one, and the next one being developed......


people who do not understand these machines.... attribute to them wild imaginings.... and there are others who push the myth for a variety of reasons..... lots of time is is for bragging rights, and to embellish academic credibility with simulations of theories and to gain funding.....


These machines are expensive....... and in reality show little gain for having and using them...


Always the myth centers on the mystique of not being able to understanding the technology, and having to take the word of others as to the machines greatness and prospects.


This Quantum Super Computer is enveloped in that mythical aura.....


how do you get data in? how do you get data out?


I can see the allure, a device made up of entangled Q bits containing an infinity of answers, every permutation and every combination.. the answers are there even before you ask the question, the more Q bits the fine the resolution of infinity......


how do you pull out the answers from an infinity of answers?


input the problem, and it gives you the answer? which one?, the sum, the difference, the product, the inversion, the square, the square root? the correct and incorrect answers are there already, no calculation necessary... how do you get the answer out?


no one explains....... how the problem is inserted, and how when where and why the answer comes out.


Answer, It's magic, trust me... no one understands it! it is beyond human understanding,


The Magical Mystical Marvelous Machine...... cost millions....


maybe you would like to buy one of these toys and see if you can discover how to get the answers out.

Pegasus
Pegasus

Double Slit Experiment...


https://www.youtube.com/watch?v=ayvbKafw2g0


Lawrence Krauss describes quantum computing...

"Let me briefly describe the difference between a quantum computer and a regular computer, at some level. In a regular computer, you've got ones and zeros, which you store in binary form and you manipulate them and they do calculations. You can store them, for example, in a way that at least I can argue simply.

Let's say you have an elementary particle that's spinning. If it's spinning, and we say it's spinning, it's pointing up or down depending upon whether it's spinning this way or this way, pointing up or down. And so, I could store the information by having lots of particles and some of them spinning up and some of them spinning down. Right? One's and zero's.

But in the quantum world, it turns out that particles like electrons are actually spinning in all directions at the same time, one of the weird aspects of quantum mechanics. We may measure, by doing a measurement of an electron, find it's spinning this way. But before we did the measurement, it was spinning this way and this way and that way and that way all at the same time. Sounds crazy, but true.

Now that means, if the electron's spinning in many different directions at the same time, if we don't actually measure it, it can be doing many computations at the same time. And so a quantum computer is based on manipulating the state of particles like electrons so that during the calculation, many different calculations are being performed at the same time, and only making a measurement at the end of the computation.

So we exploit that fact of quantum mechanics that particles could do many things at the same time to do many computations at same time. And that's what would make a quantum computer so powerful."

Quantum Computing Update: Ray Laflamme at TEDxWaterloo 2013...


https://www.youtube.com/watch?v=mlstZ_xsTD4 

WilfTarquin
WilfTarquin

Well that was completely uninformative.

For what it's worth, there is controversy over whether D-wave's computers really are quantum computers.

AndyLautin
AndyLautin

I read two versions of this, hmmm

stevek77536
stevek77536

The company is selling them, the video states.  How about trying one and telling us if it works?  Rather than describing a pig in a poke.

Rajpal
Rajpal

A quantum computer works with switches that not only exist in ON or OFF states but also in states that are simultaneously ‘ON and OFF’. The assumption that a quantum switch can be ‘ON and OFF’ at the same time is based on an INCORRECT concept of Linear Polarization. http://vixra.org/pdf/1303.0174v4.pdf 

eagles12
eagles12

@bellajj2009 What if we were the simulated universe being ran on someone else's "real" universe?  Just a thought!

bellajj2009
bellajj2009

@bellajj2009 Hey - Solomon (the guy who wrote "On Computer Simulated Universes") just released a new book on Amazon, "The Evolution of Simulated Universes".  Hope it's good.

Nyarlathotep
Nyarlathotep

@Bitflogger People thought Nikolai was a straight up Wizard when he started literally pulling lightning from out of the air into orbs. Magic is nothing but willpower coming to fruition.

Bitflogger
Bitflogger

More specifically, does the claim of "infinite calculations in an infinite number of parallel universes, in almost zero elapsed time" seem like science or magic?

JagdPanther
JagdPanther

@iamhe How do you get data in? How do you get data out? Really? Do you believe that they could sell any of them if there was no way to transfer data? 


Maybe you could go back to chewing on your Mythical Mystical Magical Mushrooms and try to figure out how to get data in and out of your toaster instead of worrying your head about something like this.

iamhe
iamhe

@JagdPanther @iamhe  I am not worried.... nor I am I being personally insulting....


You are violent in your communication..... I do not waste time in such conversations....


In the space of infinite random numbers every answer to every problem lies hidden, no one has explained how those answers are addressed, selected and read out.


can you tell us? please explain.


remember the dot com bust?