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| The machine does not fit the conventional concept of a quantum computer, but makes use of quantum effects |
A $15m computer that uses "quantum physics" effects to boost its speed is to be installed at a Nasa facility.
It will be shared by Google, Nasa, and other scientists,
providing access to a machine said to be up to 3,600 times faster than
conventional computers.Unlike standard machines, the D-Wave Two processor appears to make use of an effect called quantum tunnelling.
This allows it to reach solutions to certain types of mathematical problems in fractions of a second.
Effectively, it can try all possible solutions at the same time and then select the best.
Google wants to use the facility at Nasa's Ames Research
Center in California to find out how quantum computing might advance
techniques of machine learning and artificial intelligence, including
voice recognition.
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Geordie Rose Chief technology officer, D-waveThe gate model... is the single worst thing that ever happened to quantum computing”
University researchers will also get 20% of the time on the machine via the Universities Space Research Agency (USRA).
Nasa will likely use the commercially available machine for scheduling problems and planning.Canadian company D-Wave Systems, which makes the machine, has drawn scepticism over the years from quantum computing experts around the world.
Until research outlined earlier this year, some even suggested its machines showed no evidence of using specifically quantum effects.
Quantum computing is based around exploiting the strange behaviour of matter at quantum scales.
Most work on this type of computing has focused on building quantum logic gates similar to the gate devices at the basis of conventional computing.
But physicists have repeatedly found that the problem with a gate-based approach is keeping the quantum bits, or qubits (the basic units of quantum information), in their quantum state.
"You get drop out… decoherence, where the qubits lapse into being simple 1s and 0s instead of the entangled quantum states you need. Errors creep in," says Prof Alan Woodward of Surrey University.
SOURCE : http://www.bbc.co.uk/news/science-environment-22554494
