What is negative energy? And can it give us wormholes and warp drives?

Wormholes — Cosmic Shortcuts Through Space and Time Wormholes are hypothetical tunnels in the fabric of space-time that could connect two distant points in the universe — or even different times altogether. According to Einstein's theory of General Relativity, space-time can be warped, and in extreme cases, might form bridges between two separate locations. These bridges are called Einstein-Rosen bridges, or wormholes. If stable wormholes exist, they could theoretically allow: Faster-than-light