Playwright Nick Payne: master of the multiverse
Nick Payne might only be 28, but he's already dazzled audiences on both sides of the Atlantic. As his hit play Constellations transfers to the West End, he talks to Maddy Costa about science, superstition and why success makes him nervousSomewhere out there, in a panoply of parallel universes, Nick Payne isn't sitting in a London cafe talking to the Guardian about his plays, because he hasn't written any. Instead, he…