One possible option for traveling through a wormhole
“Wormholes,” as Stephen Hawking once said, “are all around us.” The only problem is that they are so miniscule that even the atoms that make up our physical forms are too large to fit through them. Yet we know that if we could get inside a wormhole that time travel would be possible.
The way I see it, we have two options: shrink ourselves down to the quantum level, or expand the wormholes until they are large enough for us to fit through.
In physics, a wormhole is a hypothetical topological feature of spacetime that can act as a shortcut through spacetime. On a theoretical level there are valid solutions to the equations of general relativity that contain wormholes. Wormholes known as Schwarzschild wormholes or Einstein-Rosen bridges are connections between areas of space that can be modeled as vacuum solutions to the Einstein field equations, and which are now understood to be intrinsic parts of the maximally extended version of the Schwarzschild metric describing an eternal black hole with no charge and no rotation.
Now it seems unlikely that we’ll have a way to shrink ourselves down to a quantum level anytime soon, the new Ant-man movie notwithstanding. So that leaves it up to us to figure out a way to expand these wormholes.
And that’s what I’m going to do.
The theory of general relativity predicts that if traversable wormholes exist, they will allow time travel. This can be accomplished by accelerating one end of the wormhole to a high velocity relative to the other, and then sometime later bringing it back. Relativistic time dilation would result in the accelerated wormhole mouth aging less than the stationary one as seen by an external observer. However, time connects differently through the wormhole than outside it, so that synchronized clocks at each mouth will remain synchronized to someone traveling through the wormhole itself, no matter how the mouths move around. This means that anything which entered the accelerated wormhole mouth would exit the stationary one at a point in time prior to its entry.
For example, consider two clocks at both mouths showing the date is 2000. After being taken on a trip at relativistic velocities, the accelerated mouth is brought back to the same region as the stationary mouth with the accelerated mouth’s clock reading 2005 while the stationary mouth’s clock read 2010. A traveler who entered the accelerated mouth at this moment would exit the stationary mouth when its clock also read 2005, in the same region but now five years in the past. Such a configuration of wormholes would allow for a particle’s world line to form a closed loop in spacetime, known as a closed time-like curve.
And here is an equation that backs up the theory:
As you can see, I’m well on my way to cracking wormholes. Really, the only question left is how to ready my Delorean for space fight.