Einstein was one of the founders of quantum mechanics, yet he disliked the randomness that lies at the heart of the theory. God does not, he famously said, play dice. However, quantum theory has survived a century of experimental tests, although it has yet to be reconciled with another of Einstein's great discoveries – the general theory of relativity. Below four theorists – Gerard 't Hooft, Edward Witten, Fay Dowker and Paul Davies– outline their views on the current status of quantum theory and the way forward
Abstract Everyone familiar with modern physics knows that Einstein’s attitude regarding quantum mechanics was one of skepticism. No biography of him fails to mention his saying that God does not throw dice. He was indeed given to such utterances (as I know from experience), and stronger ones, such as ‘It seems hard to look in God’s cards. But I cannot for a moment believe that He plays dice and makes use of “telepathic” means (as the current quantum theory alleges He does)’ [E1]. However, remarks such as these should not create the impression that Einstein had abandoned active interest in quantum problems in favor of his quest for a unified field theory. Far from it. In fact, even in the search for a unified theory, the quantum riddles were very much on his mind, as I shall discuss in Chapter