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Quantum Computing News and Discussions

quantum computing computing artificial intelligence D-Wave Alphabet deep learning quantum internet quantum quantum computer physics

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#21
Roh234

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I would say that we will use graphene before quantam computers. I think quantam computers may be the final paradigm.

What is true, just, and beautiful is not determined by popular vote. The masses everywhere are ignorant, short-sighted, motivated by envy, and easy to fool. Democratic politicians must appeal to these masses in order to be elected. Whoever is the best demagogue will win. Almost by necessity, then, democracy will lead to the perversion of truth, justice and beauty. -Hans Hermann Hoppe


#22
truthiness

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I think quantam computers may be the final paradigm.


That sounds like what they said when we switched from Newtonian physics to Einsteinian relativity, or shortly before the internal combustion engine was invented. Now we're moving toward unified quantum theories and string theory and considering electric cars, fully automated jets, and space tourism.

It ain't over until it's over.
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#23
Prolite

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I think quantam computers may be the final paradigm.


That sounds like what they said when we switched from Newtonian physics to Einsteinian relativity, or shortly before the internal combustion engine was invented. Now we're moving toward unified quantum theories and string theory and considering electric cars, fully automated jets, and space tourism.

It ain't over until it's over.


I think he means the next 50 years, not until the end of the universe, obviously. Some day the entire universe will be used for computing.
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#24
Roh234

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I think we will get to a point where we will be manipulating quantam strings for computing.

http://en.wikipedia....String_(physics)
http://en.wikipedia....ength)#lt_1E-15

What is true, just, and beautiful is not determined by popular vote. The masses everywhere are ignorant, short-sighted, motivated by envy, and easy to fool. Democratic politicians must appeal to these masses in order to be elected. Whoever is the best demagogue will win. Almost by necessity, then, democracy will lead to the perversion of truth, justice and beauty. -Hans Hermann Hoppe


#25
Prolite

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I think computing on quantum strings will be hard to predict as to when we'll be doing that as a species, especially considering we don't have a unified theory of physics. Perhaps a unified theory will make quantum computing on strings occur much faster than otherwise?
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#26
Craven

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I'm kinda lost. Are you talking about working on quantum-strings? THE STRINGS from unconfirmed string theory? If answer is yes I'd like to remind you that to work on strings you need energies of around 10 000 Yottaelectronovolts. That is 10^28. Our most powerful particle collider LHC at full power will be able to get us to 14 Teraelectronovolts. That is 14*10^12. So it's 10 000 000 000 000 000 times smaller that what you'd need. Ten quadrillion.
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#27
Roh234

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I'm kinda lost. Are you talking about working on quantum-strings? THE STRINGS from unconfirmed string theory? If answer is yes I'd like to remind you that to work on strings you need energies of around 10 000 Yottaelectronovolts. That is 10^28. Our most powerful particle collider LHC at full power will be able to get us to 14 Teraelectronovolts. That is 14*10^12. So it's 10 000 000 000 000 000 times smaller that what you'd need. Ten quadrillion.


LOL

Yes I was talking about those strings. I know that we don't have the tech to use them or even prove their existance, but I was guessing such tech would be available once humanity reaches a Type III civilization. But harnessing them could definitly increase the computational power of anything by many magnitudes.

What is true, just, and beautiful is not determined by popular vote. The masses everywhere are ignorant, short-sighted, motivated by envy, and easy to fool. Democratic politicians must appeal to these masses in order to be elected. Whoever is the best demagogue will win. Almost by necessity, then, democracy will lead to the perversion of truth, justice and beauty. -Hans Hermann Hoppe


#28
Unrequited Lust

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*assuming strings even exist

#29
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IBM Press Release: http://www-03.ibm.co...lease/36901.wss

IBM Research Advances Device Performance for Quantum Computing

- Latest results bring device performance near the minimum requirements for implementation of a practical quantum computer.
- Scaling up to hundreds or thousands of quantum bits becomes a possibility.


YORKTOWN HEIGHTS, NY - 28 Feb 2012: Scientists at IBM Research (NYSE: IBM)/ (#ibmresearch) have achieved major advances in quantum computing device performance that may accelerate the realization of a practical, full-scale quantum computer. For specific applications, quantum computing, which exploits the underlying quantum mechanical behavior of matter, has the potential to deliver computational power that is unrivaled by any supercomputer today.

Using a variety of techniques in the IBM labs, scientists have established three new records for reducing errors in elementary computations and retaining the integrity of quantum mechanical properties in quantum bits (qubits) – the basic units that carry information within quantum computing. IBM has chosen to employ superconducting qubits, which use established microfabrication techniques developed for silicon technology, providing the potential to one day scale up to and manufacture thousands or millions of qubits.

IBM researchers will be presenting their latest results today at the annual American Physical Society meeting taking place February 27-March 2, 2012 in Boston, Mass.

The Possibilities of Quantum Computing

The special properties of qubits will allow quantum computers to work on millions of computations at once, while desktop PCs can typically handle minimal simultaneous computations. For example, a single 250-qubit state contains more bits of information than there are atoms in the universe.

These properties will have wide-spread implications foremost for the field of data encryption where quantum computers could factor very large numbers like those used to decode and encode sensitive information.

"The quantum computing work we are doing shows it is no longer just a brute force physics experiment. It's time to start creating systems based on this science that will take computing to a new frontier," says IBM scientist Matthias Steffen, manager of the IBM Research team that's focused on developing quantum computing systems to a point where it can be applied to real-world problems.

Other potential applications for quantum computing may include searching databases of unstructured information, performing a range of optimization tasks and solving previously unsolvable mathematical problems.

How Quantum Computing Works

The most basic piece of information that a typical computer understands is a bit. Much like a light that can be switched on or off, a bit can have only one of two values: "1" or "0". For qubits, they can hold a value of “1” or “0” as well as both values at the same time. Described as superposition, this is what allows quantum computers to perform millions of calculations at once.

One of the great challenges for scientists seeking to harness the power of quantum computing is controlling or removing quantum decoherence – the creation of errors in calculations caused by interference from factors such as heat, electromagnetic radiation, and materials defects. To deal with this problem, scientists have been experimenting for years to discover ways of reducing the number of errors and of lengthening the time periods over which the qubits retain their quantum mechanical properties. When this time is sufficiently long, error correction schemes become effective making it possible to perform long and complex calculations.

There are many viable systems that can potentially lead to a functional quantum computer. IBM is focusing on using superconducting qubits that will allow a more facile transition to scale up and manufacturing.

IBM has recently been experimenting with a unique “three dimensional” superconducting qubit (3D qubit), an approach that was initiated at Yale University. Among the results, the IBM team has used a 3D qubit to extend the amount of time that the qubits retain their quantum states up to 100 microseconds – an improvement of 2 to 4 times upon previously reported records. This value reaches just past the minimum threshold to enable effective error correction schemes and suggests that scientists can begin to focus on broader engineering aspects for scalability.

Posted Image
A picture of IBM’s “3D” superconducting qubit device where a qubit (about 1mm in length) is suspended in the center of the cavity on a small Sapphire chip. The cavity is formed by closing the two halves, and measurements are done by passing microwave signals to the connectors. Despite the apparent large feature size (the cavity is about 1.5 inches wide) for this single qubit demonstration, the team believes it is possible to scale such a system to hundreds or thousands of qubits.

In separate experiments, the group at IBM also demonstrated a more traditional “two-dimensional” qubit (2D qubit) device and implemented a two-qubit logic operation – a controlled-NOT (CNOT) operation, which is a fundamental building block of a larger quantum computing system. Their operation showed a 95 percent success rate, enabled in part due to the long coherence time of nearly 10 microseconds. These numbers are on the cusp of effective error correction schemes and greatly facilitate future multi-qubit experiments.

Posted Image
A picture of the Silicon chip housing a total of three qubits. The chip is back-mounted on a PC board and connects to I/O coaxial lines via wire bonds (scale: 8mm x 4mm). A larger assembly of such qubits and resonators are envisioned to be used for a scalable architecture.

IBM and Quantum Computing Leadership

The implementation of a practical quantum computer poses tremendous scientific and technological challenges, but all results taken together paint an optimistic picture of rapid progress in that direction.

Core device technology and performance metrics at IBM have undergone a series of amazing advancements by a factor of 100 to 1,000 times since the middle of 2009, culminating in the recent results that are very close to the minimum requirements for a full-scale quantum computing system as determined by the world-wide research community. In these advances, IBM stresses the importance and value of the ongoing exchange of information and learning with the quantum computing research community as well as direct university and industrial collaborations.

“The superconducting qubit research led by the IBM team has been progressing in a very focused way on the road to a reliable, scalable quantum computer. The device performance that they have now reported brings them nearly to the tipping point; we can now see the building blocks that will be used to prove that error correction can be effective, and that reliable logical qubits can be realized,” observes David DiVincenzo, professor at the Institute of Quantum Information, Aachen University and Forschungszentrum Juelich.

Based on this progress, optimism about superconducting qubits and the possibilities for a future quantum computer are rapidly growing. While most of the work in the field to date has focused on improvements in device performance, efforts in the community now must now include systems integration aspects, such as assessing the classical information processing demands for error correction, I/O issues, feasibility, and costs with scaling.

IBM envisions a practical quantum computing system as including a classical system intimately connected to the quantum computing hardware. Expertise in communications and packaging technology will be essential at and beyond the level presently practiced in the development of today’s most sophisticated digital computers.

Registered journalists and bloggers can download video about IBM quantum computing at The NewsMarket.

#30
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"The special properties of qubits will allow quantum computers to work on millions of computations at once, while desktop PCs can typically handle minimal simultaneous computations. For example, a single 250-qubit state contains more bits of information than there are atoms in the universe. " Hmm, what are the implications of that? What if we scale up the qubit to to many times than 250 qubits?
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#31
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Hmm, what are the implications of that? What if we scale up the qubit to to many times than 250 qubits?


Then we can effectively simulate the entire universe.

#32
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Hmm, what are the implications of that? What if we scale up the qubit to to many times than 250 qubits?


Then we can effectively simulate the entire universe.


All that within our reach already... and this decade is far from over.
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#33
CyberMisterBeauty

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Hmm, what are the implications of that? What if we scale up the qubit to to many times than 250 qubits?


Then we can effectively simulate the entire universe.


Simulate the entire universe?It will require infinite processment power(in other words,impossible eheheh),because the universe is infinite(that's waht they say...)


Ps:imagine a virtual world or ambient that is infinite!!pretty crazy!

#34
H3llion

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Damn I wonder when Quantum Computers come mainstream and affortable to the public. Il be probably 28 (10 years from now on) :X

#35
SG-1

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The universe is not infinite that's impossible. EDIT: Just did a google search and apparently that's still a debatable topic..

Edited by SG-1, 29 February 2012 - 02:32 AM.

Hey.  Stop reading.  The post is over.


#36
mic of orion

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The universe is not infinite that's impossible.

EDIT: Just did a google search and apparently that's still a debatable topic..


Well theory goes that before universe there was nothing, and when universe came to being there was something, but that something is expanding, so the question is what is it expanding in to,?

This is why we have theory of multiverse, interesting set of ideas that I won't go in to right now, but you can google it and find out more :D
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#37
Craven

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Infinite universe may mean that it simply has no end/edge. like round rubber band go one way and eventually you'll end up in start point. As for "what is it expanding into" I'll let dr Dave Goldberg answer: http://io9.com/55265...-expanding-into
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#38
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When scientists describe the universe as having a size, they're usually talking about the observable universe. I'm absolutely shocked that quantum computers can be that powerful though. Are you sure there isn't a mistake?
NO!

#39
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Here is a video.
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#40
Craven

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When scientists describe the universe as having a size, they're usually talking about the observable universe. I'm absolutely shocked that quantum computers can be that powerful though. Are you sure there isn't a mistake?


Well universe at sufficiently low level behaves like smart game engine. Heisenberg Uncertainty Principle removes necessity of tracking every molecule in universe, lot such simulated universe could be optimised, lot of events could be generalised by mix of averages, probabilistic and numerical methods. There really is quite big body of evidence that suggests possibility of creating a simulation of whole universe with limited resources.
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