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sleepsleep



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sleepsleep
http://arstechnica.com/science/2016/05/how-ibms-new-five-qubit-universal-quantum-computer-works/

Quote:
Quantum computing has a problem with error correction—a far worse one than classical computing faces. Let's put it in perspective. One option for a qubit is a superconducting quantum interference device where the typical energy difference between a one and a zero is on the order of 10-24 joules.


Quote:
Making matters worse, a qubit state is not a one or a zero but is a probability to produce a one or a zero on measurement, and this probability evolves in time.


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Quantum computing will require sophisticated error correction from the get go. It is not just a case of flipping a bit; you have to know how the different qubits evolve differently in time and how to correct for that before you measure them.


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it expects to hit between 50 and 100 qubits within the next decade. At 50 qubits, IBM will be able to do useful stuff. That means useful qubit numbers should be coming within five years and toys that do neat tricks a couple of years later.


hi ibm, bye intel, Embarassed
Post 04 May 2016, 19:07
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sleepsleep



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sleepsleep
http://www.theverge.com/2016/5/4/11589656/ibm-quantum-computing-cloud

Quote:
IBM has opened up its quantum computing research to the web, launching an online simulator that lets anyone run quantum experiments on the company's hardware.


http://www.research.ibm.com/quantum/
Quote:

Introducing the IBM Quantum Experience, the world’s first quantum computing platform delivered via the IBM Cloud.


https://quantumexperience.ng.bluemix.net/
Post 04 May 2016, 19:15
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ManOfSteel



Joined: 02 Feb 2005
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ManOfSteel
sleepsleep wrote:
hi ibm, bye intel, Embarassed

It's not that surprising you know. After all, Deep Blue was IBM too. Twenty years ago.

A company staying in business for more than a century means it's innovative and competitive and has a visionary leadership, which in turn are pretty good indications that something useful and exciting is going to come out of it sooner or later, especially when it's core business is related to science and/or technology. Wink
Post 05 May 2016, 18:42
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sleepsleep



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sleepsleep
i think ibm just sets a new moore law race to something incredible in our near future =)

http://wccftech.com/intel-abandoning-silicon-7nm/
Image
Post 05 May 2016, 22:04
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
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revolution
A QC is not a general purpose computer, A GPU has a much better chance of becoming general purpose than a QC. There are major fundamental differences between a QC and a classical CPU. If it is possible to ever get to the point of something on the order of a 15Mbits (not 15bits) QC then some specialised tasks becomes practical but you will still need the traditional CPU and GPU there to do the everyday tasks.

From what I understand there are currently only two useful tasks that a QC would be good for. Factoring and DB searching. Factoring is not something the average person cares about. DB searching is very important but you need a QC to have enough bits to store the entire DB so anyone with a DB of more than a few bits is out of luck.
Post 06 May 2016, 01:29
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sleepsleep



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sleepsleep
afaik, QC have the possibilities to crack some of the common "security & encryption" used by most people in traditional computing,

assume if no effort to hardened current used security standard, sooner or latter, QC would catch up and do drama, Embarassed
Post 06 May 2016, 04:49
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
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revolution
sleepsleep wrote:
afaik, QC have the possibilities to crack some of the common "security & encryption" used by most people in traditional computing,

assume if no effort to hardened current used security standard, sooner or latter, QC would catch up and do drama, Embarassed
This is not really a big deal. We only need to double the bit lengths we use to achieve the same security we would against classical computers. QCs are not magic, they can't instantly factor numbers, they also take their time to run the algorithms.
Post 06 May 2016, 07:22
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Tyler



Joined: 19 Nov 2009
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Tyler
They can factor them in poly, though. (Shor's algo) So I'm not sure doubling them would be enough. For encryption, I think we'd have to move to different crypto schemes that don't involve factoring (and maybe not even discrete logs, a la ECDSA). (Those exist.)

I think where you got the "double the bit lengths" solution is Grover's algorithm, which allows a quadratic (sqrt) speed up on finding inputs to black boxes that yield the output you desire.

Of course, like you've already said, these are very distant and theoretical concerns. It'll be awhile before they're practical.
Post 06 May 2016, 07:31
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