This week, in Sydney, there was the announcement of not one but TWO Quantum Computing centres opening at two rival universities (UNSW and USYD). There was a feature on one of the current affairs shows here with the very charismatic guitar-playing professor of one of the centres, which has had a major funding injection by Microsoft. The other centre was opened by none other than the Prime Minister, Malcolm Turnbull. (Article is here.) Now I understand the very basics of quantum computing - that it is based on QBits, not binary bits, which in turn exploit the phenomena of entanglement and superposition to perform calculations that would be impossible to execute in binary systems. I understand that David Deutsch is one of the main theorists behind the field, and that he is something of a science super-star (who also happens to believe in t he Many Worlds interpretation of quantum physics, which is somehow important to his theory of quantum computing.) But I have also read that there is scepticism as to whether a working quantum computer can be built, because of the 'problem of de-coherence', which poses a huge technical challenge. There is a company, DWave, which Google has a stake in, which claims to have produced a working quantum computer, but others, notably a physicist called Scott Aaronson, are sceptical, saying that the output could have been produced by a common-or-garden variety super computer. So is the quantum computer hype? Or is it real?