Quantum Entanglement

Quantum entanglement allows two objects to affect each other’s behaviour instantly across vast distances — what Albert Einstein called “spooky action at a distance”. But by how much? The answer could be incalculable, says a team of 5 researchers in a 165-page preprint. In one fell swoop, their proof solves a number of related problems in pure mathematics, quantum mechanics and a branch of computer science known as complexity theory. If it holds up, “it’s a super-beautiful result” says theoretical quantum physicist Stephanie Wehner.