Wormholes and Other Universes

Abstract

According to a well-known theorem in classical black hole physics, you need a singularity to produce a wormhole. On the quantum level, however, space is filled with tiny wormholes. It appears, then, that if we are ever to have a large wormhole, we are going to have to start with a small one and enlarge it. We have no idea at the present time how we would do this, but we do know that it is important to try to understand how these tiny quantum worm-holes behave. As it turns out, there has been a considerable amount of work in this area in the past few years.