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Justin Trudeau explains the basics of quantum computing to reporters

macleans.ca

11–20 of 54 posts

Re: Justin Trudeau explains the basics of quantum computing to reporters

#11

While this seems planted and trite (much like the "because it's 2015" answer), I have to confess that I don't get quantum computing. A qubit can hold multiple values, it seems. Okay, that's a data density improvement (presuming a quibit is as dense as a traditional bit). How does that improve computing power (especially by the many magnitudes)? Do you multiply a qubit of infinite values against a quibit of infinite v…

Google 'quantum complexity classes'.

Re: Justin Trudeau explains the basics of quantum computing to reporters

#13

I see no evidence that his knowledge is any better than a layman's, and this really feels like a promotional piece. It's pretty sad that people are surprised or impressed when a politician has a layman's understanding of something in science.

> I see no evidence that his knowledge is any better than a layman's

Really? I got the impression that he didn't really get the significance of Q-bits and just thought of it as 'stores more stuff than a digital-bit; MORE GB!!!'.

At the same time, I'd be surprised if a man-on-the-street interview would give anywhere near as good of an answer.

> It's pretty sad that people are surprised or impressed when a politician has a layman's understanding of something in science.

Sad yes, but probably a mentality brought on by the number of U.S. politicians who activity don't believe and don't understand many things in science (great answer from Carl Sagen on Charlie Rose on this: https://youtu.be/U8HEwO-2L4w?t=56).

Re: Justin Trudeau explains the basics of quantum computing to reporters

#14

While this seems planted and trite (much like the "because it's 2015" answer), I have to confess that I don't get quantum computing. A qubit can hold multiple values, it seems. Okay, that's a data density improvement (presuming a quibit is as dense as a traditional bit). How does that improve computing power (especially by the many magnitudes)? Do you multiply a qubit of infinite values against a quibit of infinite v…

One qubit could hold 0 and1 simultaneously and perform some operations/calculations on it simultaneously.

Two (entangled) qubits could hold 00, 01, 10, 11 simultaneously and perform calculations on these four values simultaneouslty.

...

100 (entangled) qubits could hold 2^100 distinct values simultaneously and perform calculations on them simultaneously.

That's the basic idea. The problem is keeping entangled state that's becomes harder and harder as number of entangled qubits grows.

Also there are limitations in extracting of calculations results from system of qubits, so not all algorithms can be speed up on quantum computers (but e.g. integer factorization can).

Re: Justin Trudeau explains the basics of quantum computing to reporters

#15

I see no evidence that his knowledge is any better than a layman's, and this really feels like a promotional piece. It's pretty sad that people are surprised or impressed when a politician has a layman's understanding of something in science.

It might just be a reflection on North American politics, but I think it is impressive when a politician is willing to educate themselves about the basics of any technical subject.

Re: Justin Trudeau explains the basics of quantum computing to reporters

#16

While this seems planted and trite (much like the "because it's 2015" answer), I have to confess that I don't get quantum computing. A qubit can hold multiple values, it seems. Okay, that's a data density improvement (presuming a quibit is as dense as a traditional bit). How does that improve computing power (especially by the many magnitudes)? Do you multiply a qubit of infinite values against a quibit of infinite v…

I'm no expert and might be horrible wrong on the math, but I imagine it like this:

2 bit => 2 ^ 2 => 1 of 4 possible state

2 qbit => 4 of 4 possible states. That's 4 times the information (although extraction of the information is limited)

With bigger numbers:

10bit => 1 of 1024 possible states

10qbit => 1024 of 1024 possible states (1024 times as much)

Re: Justin Trudeau explains the basics of quantum computing to reporters

#17

I see no evidence that his knowledge is any better than a layman's, and this really feels like a promotional piece. It's pretty sad that people are surprised or impressed when a politician has a layman's understanding of something in science.

When you have half of the American candidates denying climate-change or evolution, you get excited when you see a political leader who evidently has taken the time to have a basic understanding of new and upcoming fields of study.

Re: Justin Trudeau explains the basics of quantum computing to reporters

#18

I see no evidence that his knowledge is any better than a layman's, and this really feels like a promotional piece. It's pretty sad that people are surprised or impressed when a politician has a layman's understanding of something in science.

He went around the perimeter institute building in Waterloo Ontario in Canada and spent some time learning the basics and trying to understand the work that they do there. He did understand the basic ideas that he was saying, it wasn't just a script and he was active and engaged learning throughout the day. Obviously he won't understand very much detail about it, but he doesn't need to. He is a prime minister, not working in this complex field of study. His goal has been trying to understand these more modern technologies so that he can better make decisions for the future. It is important for policy makers to understand the things they are making decisions about.

Re: Justin Trudeau explains the basics of quantum computing to reporters

#19
post #8

I see no evidence that his knowledge is any better than a layman's, and this really feels like a promotional piece. It's pretty sad that people are surprised or impressed when a politician has a layman's understanding of something in science.

The Canadian media is highly supportive of Trudeau at the moment and, with the exception of more reputable periodicals like the Globe and Mail and the National Post, are taking every opportunity to gush. That said, Trudeau has shown a significant capacity to leverage those around him to display competencies he wouldn't have on his own.

I think the National Post is doing more than "not gushing" about Trudeau, they take every opportunity to gut him, and I think it's a very clear indication of our "more reputable periodical's" very clear conservative bias which, as illustrated by the Andrew Coyne incident [0], is transparently driven by owner pressure.

[0] http://www.cbc.ca/news/trending/andrew-coyne-resigns-editor-...

Re: Justin Trudeau explains the basics of quantum computing to reporters

#20

While this seems planted and trite (much like the "because it's 2015" answer), I have to confess that I don't get quantum computing. A qubit can hold multiple values, it seems. Okay, that's a data density improvement (presuming a quibit is as dense as a traditional bit). How does that improve computing power (especially by the many magnitudes)? Do you multiply a qubit of infinite values against a quibit of infinite v…

I was under the impression that the benefit of quantum computing was the ability to come to the "correct" answer for certain kinds of computationally complex problems instantaneously without having to actually "compute" them. So for example you'd spend a great deal of time up front engineering a way to present a problem to a quantum computer and when you execute said program it gives you the result that very moment without actually having to perform any traditional "operations".

So for example, let's say you wanted to figure out if some enormous number is prime. If you get your program right you could feed it to a quantum computer and all possible states of prime/non-prime would be measured at once resulting in the answer (state) being available the moment you "observe" it.

From this perspective quantum computing can be nearly infinitely faster than traditional computers while at the same time being mostly useless for every-day tasks such as surfing the web.

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