Resumen de Use wormholes to send messages through time
Like some bizarre form of optical fibre, a long, thin wormhole might let one sends messages back in time using pulses of light. Predicted by Einstein's general theory of relativity, wormholes are tunnels connecting two points in space-time. If something could traverse one, it would open up intriguing possibilities. But there's a problem: Einstein's wormholes are notoriously unstable and they don't stay open long enough for anything to get through. Theoretical attempts to use such plates to keep wormholes open have so far proved untenable. Now Luke Butcher at the University of Cambridge may have found a solution. He has shown that if the wormhole's throat is orders of magnitude longer then the width of its mouth, it creates Casimir energy at its center
