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0 pointsmatt429y ago0 comments

I do not know anything in quantum computing but I read that D-Wave already reached 1000 qubits. Does it mean that their computer is already more powerful that any classical super computer ?

http://www.dwavesys.com/press-releases/d-wave-systems-breaks...

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4 comments · 2 top-level

Strilanc9y ago· 1 in thread

It's not the same kind of quantum computer. D-Wave makes an annealer. They also have a history of making grandiose claims.

I think getting to fifty proper qubits will be a much bigger deal than D-Wave getting to even ten thousand "qubits". But I suppose time will tell.

matt42OP9y ago

There is a very good visual explanation of the difference bettween quantum annealer and univeral quantum computer: https://www.youtube.com/watch?v=zvfkXjzzYOo

nabla99y ago· 1 in thread

D-Wave is doing adiabatic quantum computation. It's quantum analog computer. Comparable classical electric analog computers were last used in 50s or 60s.

There is no consensus whether D-Wave actually provides clear quantum speedup or not.

Rønnow TF, Troyer M, Wang Z, Job J, Boixo S, Isakov SJ, Wecker D, Martinis JM: Defining and detecting quantum speedup, Science, 19 June 2014, http://science.sciencemag.org/content/345/6195/420 doi:10.1126/science.1252319

krastanov9y ago

Slight correction: D-Wave are most definitely not doing "adiabatic quantum computation". They occasionally have claimed that in the past, but not anymore.

Adiabatic quantum computation is equivalent to other models of quantum computing (e.g. the circuit model). It has all the power expected from a quantum computer.

D-Wave do some form of annealing that can be simulated classically in a fairly efficient manner.

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