量子重置

Quantum reset To predict when we will have a truly useful quantum computer, we need to know precisely what one is – but that is a tricky endeavour, discovers Karmela Padavic-Callaghan WHAT is a quantum computer? The question feels deceptively simple. It is a computer that uses quantum effects to run calculations – or at least, that is what I have been saying for years. Because I frequently report the latest advances in quantum computing, I have felt confident in this answer. Recently, however, I have had to re-examine that confidence. Though I can name many different components and functions of a quantum computer, could I identify exactly when they all become a quantum computer? …