Quantum computers

Although many useful demonstrations of quantum computing have resulted from such special-purpose devices, they are basically one-problem computers which cannot easily be reprogrammed or scaled to attack larger problems. As early models of practical quantum ...  

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judgecorp writes "Researchers at Vienna's Quantum Science and Technology Center have proposed that 'blind' quantum computing could be carried out securely in the cloud. When (if?) quantum computers are developed, they will be very fast, but not everyone will have them. Blind quantum computing will be useful, because it shows that users can encode 'qubits' and send them to a shared quantum computer to be worked on — without the quantum computer...  

Two coming forces in the computing world are cloud computing and quantum computing. Cloud computing, for those few of you who do not know already, uses a network or Internet connection to have some process done not on a local machine or terminal, but by a different more powerful computer or server. Assuming there is a stable connection, this could allow an underpowered netbook to "play" a game like Crysis or Metro 2033. For playing (more...  

(PhysOrg.com) -- Wouldn’t it be nice if we could just jump from using computers based on circuits to machines based on quantum bits (qubits)? Things would run ever so much faster. Alas, the problem is, scientists have to first figure out how to make it all work, and thus far, little real progress has been made.  

Scientists at the Centre for Quantum Computation and Communication Technology at the University of New South Wales in Sydney, Australia, have announced the creation of a nanoscale wire that conducts electricity. The team announced the finding on Thursday ...  

The most extensive quantum computation in history took just 270 milliseconds, say quantum physicists. Quantum computers are in danger of losing their lustre. These machines exploit the strange rules of quantum mechanics to carry out calculations that are vastly more powerful than anything that conventional computers can do.  

The US Air Force is developing simple but reliable quantum computers that can be built with off-the-shelf components Light is one of the most promising carriers of quantum information. It is robust against decoherence because it does not interact with stray electric and magnetic fields and passes unscathed through transparent matter.  

Scientists are making some headway in building quantum computers using holograms. By exploiting the unusual characteristics of quantum mechanics, quantum computers could potentially crank out calculations a billion times faster than today's integrated circuits. The power of quantum computers lies in the ability of a quantum bit (qubit) to exist in a zero or one [...]  

Entangled Qubits Clusters of entangled qubits allow remote quantum computing to be performed on a remote server, while keeping the contents and results hidden. EQUINOX GRAPHICS When quantum computers eventually reach larger scales, they’ll probably ...  

One popular quantum information system design uses light to transfer information among qubits, entangled particles that will exploit the inherent weirdness of quantum phenomena to perform certain calculations impossible for current computers.  

Quantum computing is one of those promises you hear a lot about in physics. The idea is that by entangling the quantum states of a bunch of atoms you can effectively do lots of calculations in parallel on exactly the same hardware. The right ...  

The U.S. Air Force is developing simple but reliable quantum computers that can be built with off-the-shelf components, Technology Review Physics arXiv Blog reports. In recent years, physicists have worked out how to make photons interact using interferometers and to carry out quantum computations using the output of one interferometer as the input for another. [...]  

Quantum Computing with Holograms Just like that Warner A. Miller, Grigoriy Kreymerman, Christopher Tison, Paul M. Alsing, Jonathan R. McDonald via arXiv In a paper far too daunting for a Monday, researchers at the Air Force Research Lab (AFRL) have ...  

The wires are fully functioning, with current-carrying capacity equivalent to that of a microprocessor's copper cable, despite being 20 times thinner - and 10,000 times narrower than a human hair ... by placing atomically thin layers of phosphorus in ...