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Old 9th January 2019, 05:51 AM   #1
Cheetah
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Want a quantum computer? - IBM Q System One

IBM Q System One


Quote:
To make quantum computers more reliable and stable, IBM Q designed and built the worldís first integrated quantum computing system for commercial use: IBM Q System One.

IBM Q System One enables universal approximate superconducting quantum computers to operate beyond the confines of the research lab for the first time.

It looks the part.


Quote:
a nine-foot-tall, nine-foot-wide case of half-inch thick borosilicate glass forming a sealed, airtight enclosure. Its glass door opens effortlessly, simplifying the systemís maintenance and upgrade process while minimizing downtime Ėmaking the IBM Q System One uniquely suited for reliable commercial use

Some more info.
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Old 9th January 2019, 08:17 AM   #2
The Great Zaganza
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Sorry, but the Cray Y-MP was a much better piece of furniture.
This one is at best a Conversation Piece.
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Old 9th January 2019, 11:49 AM   #3
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How long before we have something like this on our desks?
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Old 9th January 2019, 11:54 AM   #4
RecoveringYuppy
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Originally Posted by Jungle Jim View Post
How long before we have something like this on our desks?
It's interviewing for your job right now.
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Old 9th January 2019, 12:15 PM   #5
The Great Zaganza
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Originally Posted by RecoveringYuppy View Post
It's interviewing for your job right now.
Or is it?
Impossible to say until the waveform collapses.
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Old 9th January 2019, 01:08 PM   #6
WhatRoughBeast
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Originally Posted by The Great Zaganza View Post
Sorry, but the Cray Y-MP was a much better piece of furniture.
This one is at best a Conversation Piece.
Yeah. The Cray at least had nice padded seats.
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Old 9th January 2019, 03:05 PM   #7
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How long before Apple buys one and its fanboys then claim that they invented quantum computers?
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Old 9th January 2019, 03:13 PM   #8
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A quantum 3-D printer might be fun.
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Old 9th January 2019, 03:22 PM   #9
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The 75 microsecond up-time per session is a slight drawback.
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Old 9th January 2019, 07:44 PM   #10
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Originally Posted by Cheetah View Post
Geez. It looks like something out of a sci-fi movie
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Old 9th January 2019, 11:52 PM   #11
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Good bye to conventional encryption. Either this, or a slightly better model will be able to crack any encryption by looking at every possibility at the same time.
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Old 12th January 2019, 04:09 PM   #12
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Originally Posted by rjh01 View Post
Good bye to conventional encryption. Either this, or a slightly better model will be able to crack any encryption by looking at every possibility at the same time.
Nah, still won't be able to crack the strongest encryption... My hand writing, even I can't decrypt it half the time.

Seems rather a lot of effort into making it look pretty, does all that engineering with opening the cube add anything to the computing side?
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Old 12th January 2019, 10:29 PM   #13
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Article in Wired, less impressed.



Quote:
The Q System One has 20 qubits, some way short of the 50 qubits that most researchers believe will be required to reach quantum supremacy. ďA 20-qubit system is unlikely to be practically useful,Ē says Robert Young, director of the Lancaster Quantum Technology Centre

Why is that?
Would 50 qubits be better than 3x20 qubit systems?
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Old 13th January 2019, 09:53 AM   #14
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Originally Posted by Cheetah View Post
Why is that?
Would 50 qubits be better than 3x20 qubit systems?

I think the relevant scaling is exponential. 2^20 * 3 is way smaller than 2^50.
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Old 13th January 2019, 05:56 PM   #15
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Originally Posted by Myriad View Post
Originally Posted by Cheetah View Post
Why is that?
Would 50 qubits be better than 3x20 qubit systems?

I think the relevant scaling is exponential. 2^20 * 3 is way smaller than 2^50.
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Old 13th January 2019, 06:20 PM   #16
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Wasn't Noah's Ark only 300 qubits?

Of course, that answer might be slightly erroneous since it was derived by using the aRK Length formula...
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Old 13th January 2019, 08:52 PM   #17
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Originally Posted by Cheetah View Post
It looks the part.
Looks like a fancy coffee machine.
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Old 13th January 2019, 11:20 PM   #18
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Originally Posted by Elagabalus View Post
Wasn't Noah's Ark only 300 qubits?

Of course, that answer might be slightly erroneous since it was derived by using the aRK Length formula...
As long as he kept the planks constant...
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Old 14th January 2019, 04:34 PM   #19
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Are there any examples of the sorts of calculations it can do? (Q System One, not Noah's Ark)

Can it run (or do the quantum components of) Shor's Algorithm for any non-trivial product of primes? I assume not.
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Old 21st January 2019, 04:17 AM   #20
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We had a bit of quantum stuff in physics 101 (which I can hardly recall and didn't do very well in anyway) and I have read a few popular science books and articles.
They all basically explain that you use qubits in superpositions to do a calculation. Your calculation therefore includes all possible values of the variables, whereas with bits you would need to do a separate calculation for every value. That is how a quantum algorithm using qubits is able to provide an answer in fewer steps than classical algorithms and bits can.

What I still don't know is this: Since the quantum algorithm uses all possible values it must give all possible answers. How do you pick the correct answer out of the superposition of all possible answers.
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Old 21st January 2019, 05:37 AM   #21
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But can I play Diablo II on it?
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Old 21st January 2019, 06:42 AM   #22
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Originally Posted by Cheetah View Post
We had a bit of quantum stuff in physics 101 (which I can hardly recall and didn't do very well in anyway) and I have read a few popular science books and articles.
They all basically explain that you use qubits in superpositions to do a calculation. Your calculation therefore includes all possible values of the variables, whereas with bits you would need to do a separate calculation for every value. That is how a quantum algorithm using qubits is able to provide an answer in fewer steps than classical algorithms and bits can.

What I still don't know is this: Since the quantum algorithm uses all possible values it must give all possible answers. How do you pick the correct answer out of the superposition of all possible answers.
It is analogous to a pile of clear marbles and one or more red marbles.

A human would scan all marbles simultaneously and just pick out the red one(s).

A computer would use a simple sorting algorithm and check each marble to see it if is red.

Supposedly a quantum computer can do what humans do and scan all marbles simultaneously and just pick out the red ones. (although to be honest I am still not sure precisely how)

Computers are already faster than humans on most tasks like this, but now with this capability, quantum computers are even much faster still.
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Old 21st January 2019, 07:23 AM   #23
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Originally Posted by Red Baron Farms View Post
It is analogous to a pile of clear marbles and one or more red marbles.

A human would scan all marbles simultaneously and just pick out the red one(s).

A computer would use a simple sorting algorithm and check each marble to see it if is red.

Supposedly a quantum computer can do what humans do and scan all marbles simultaneously and just pick out the red ones. (although to be honest I am still not sure precisely how)

Computers are already faster than humans on most tasks like this, but now with this capability, quantum computers are even much faster still.

We don't actually know how humans do it, but you've left out the possibility that parallel processing could be used in either the human brain or the computer to have all balls being checked "simultaneously".
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Old 21st January 2019, 07:57 AM   #24
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Computer scientist Scott Aaronson has a good blog. In it he discusses - among other things - whether quantum computers will, in fact, be better than ones we know and love. With appropriate technical caveats, he claims that no one has proven - in a computing science sense - that any quantum algorithms will be better (faster, mainly) than classical ones ... with the exception of simulating quantum systems (including quantum computers!).

In particular, there are lots of encryption systems which will be just as impervious to a quantum computer's attack on them as they are to decryption techniques already in widespread use.

So, the most likely revolution will come with devising quantum algorithms that can - provably - run faster than classical ones. Not with a 50 qubit system.

tl;dr: with one important exception, quantum computing is vastly over-hyped.
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Old 21st January 2019, 09:32 AM   #25
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Based on wikipedia (https://en.wikipedia.org/wiki/Quantum_algorithm) there are several algorithms proven (theoretically) to be faster on quantum computers.

No word on actual implementation though ..
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Old 21st January 2019, 01:03 PM   #26
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I got it wrong.

Public key cryptography will indeed be at risk if there is a "full, error-corrected, universal quantum computer" that can work on cracking the codes (see this Scott Aaronson blog entry). Such a machine may also allow bitcoin to be hacked. But such a machine is very different from the sort of 50 qubit ones IBM and others are working on.

Simulation of quantum systems (physics, chemistry) should bring lots of benefits, but not so much for optimization and machine learning.

Now if there were a proof that P = NP, or P != NP ...
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Old 21st January 2019, 01:20 PM   #27
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Hm .. anyway, non-deterministic computers are nothing new (theoretically I mean). Any idea if there are problems which would be NP using even those ? In other words, might there exist cryptography which would be effective even with full quantum computers ?

I mean something similar to RSA, open key .. you can always have private, single use key cryptography.
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Old 21st January 2019, 01:40 PM   #28
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Originally Posted by Dr.Sid View Post
Hm .. anyway, non-deterministic computers are nothing new (theoretically I mean). Any idea if there are problems which would be NP using even those ? In other words, might there exist cryptography which would be effective even with full quantum computers ?

I mean something similar to RSA, open key .. you can always have private, single use key cryptography.
There is encryption that would be safe from a full quantum computer, but it will require a big job of re-tooling by almost every company. A big economic disruption if we get surprised by a full QC becoming viable.

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