Is it –will it bee Enough’to get them on the trail?.. ]]>

In reality quantum computers use coherence (maintenance of superpositions) while performing calculations in order to allow the multiverse (yes, the multiverse) to perform all possible calculations on the qubits in parallel. By the end of the quantum algorithm the system is ready to be “collapsed”, at which point in time the information from all the universes contribute toward the answer. Because quantum computers take advantage of the multiverse for parallel computing, they can solve problems that would normally be too large to solve with the theoretically most powerful computer our “single universe” could produce.

D-wave’s particular quantum algorithm cannot function as a “general cpu”, it merely performs an optimization algorithm. Lucky for us, many hard problems of today can be framed as optimization problems… though its lack of general computing makes many scream on the sidelines that it’s not a “real” quantum computer. To make matters worse for D-wave, it actually solves any problem posed to it numerous times and takes the average answer – because the system has such large quantum instability that often it produces wrong answers.

Anyhow – just wanted to write this to set the record straight about what a quantum computer is doing.

]]>Maybe the time has come for quantum computers. ]]>

Get ready for a wild ride within the next few years! I doubt we can even comprehend the potentialities.

]]>http://www.scottaaronson.com/blog/?p=1400

NASA, Google et al are researching this device to see if and how it can be used. It is highly premature to hail D-Wave as the future. It uses some quantum effects to achieve computation but this is not the same as quantum computation as generally understood – eg. it cannot run Shor’s algorithm.

]]>