Warp Drives In General Relativity
The concept of a warp drive has been the stuff of science fiction for the longest time.. But all that is changing with the Alcubierre Drive. In 2000 Alcubierre posted the first paper on the matter and it's been an active area of research ever since. The Alcubierre (or "warp drive") metric is usually discussed in the context of an ADM formalism. This allows a Hamiltonian formulation of general relativity which is an interesting concept in it's own right.
At least for me this is a completely new setup for GR which I was previously unaware of. I hope to study all this in more detail over the coming months. If you love geometry or have a thing for GR then I'm willing to bet you'll love this stuff! Go ahead. Check it out!