
ONE of the phrases of Albert Einstein, a quotable physicist, that has leaked into the popular consciousness is “spooky action at a distance”. The derisive quotelet arose during the early days of quantum mechanics, a theory that powered a revolution in science that is still playing out.
None of today’s gadgets, for example, could have been made without a deep understanding and exploitation of the theory’s basic tenets. Yet those ground rules come with other predictions so counterintuitive that Einstein came to think that the theory was missing something: what seemed odd was, he argued, just a reflection of a lack of knowledge.













