WHAT’S BEING CLAIMED:
- Under the law of theoretical physics, time travel is technically possible.
- We can go back in time through a wormhole however, we cannot travel to the future.
- Astrophysicist and science writer Ethan Siegel has explained how a person could travel through a wormhole.
A wormhole is a portal through space created by fluctuating energies in different directions. In a blog post for Forbes, American theoretical astrophysicist Ethan Siegel wrote on how one can go back in time through a wormhole by applying Einstein’s General Relativity.
Siegel explained that the positive and negative fluctuations would each develop a curved space that opposes the other. A wormhole can be created when the two spaces were connected. If it lasted long enough, in theory, a particle could be transported through.
But still, it would need to discover particles with a negative energy and mass. Once found, it would need to create a supermassive black hole and negative mass/energy counterpart. Siegel says, this “should allow for a traversable wormhole.”
Once it is achieved, it then need the laws of special relativity to involve the time aspect.
“If you travel close to the speed of light, you experience a phenomenon known as time dilation. Your motion through space and your motion through time are related by the speed of light: The greater your motion through space, the less your motion through time,” Siegel further explains.
If you were traveling at almost the speed of light, more than 80 years would have passed when you returned to Earth. It’s because time travels forward. This is not the case with wormholes.
“Well, a year isn’t the same for everyone, particularly if they’re moving through time and space differently! If we talk about the same speeds as we did earlier, the “in motion” end of the wormhole would have aged 40 years, but the “at rest” end would only have aged by one year. Step into the relativistic end of the wormhole, and you arrive back on Earth only one year after the wormhole was created, while you yourself may have had 40 years of time to pass.”
Technically, it means that if someone had created a wormhole 40 years ago, travelling back in time to the 1970s could be possible. This excludes the possibility of the grandfather paradox, a situation where a time traveler could travel back in time and kill their grandfather consequently preventing their birth.
“Even if the wormhole were created before your parents were conceived, there’s no way for you to exist at the other end of the wormhole early enough to go back and find your grandfather prior to that critical moment.”
“A great many unusual things become possible in the Universe if negative mass/energy is real, abundant, and controllable, but traveling backwards in time might be the wildest one we’ve ever imagined,” Siegel writes in conclusion.