Time Travel: Future Reality Or Present Imagination?
How can time be altered? How can we go back in time? Can we go to the future?
“If time travel is possible, where are the tourists from the future?”
― Stephen Hawking, A Brief History of Time
Stephen Hawking may have been the person that achieved the most in topics such as Black holes and time machines, the famous cosmologist was constantly puzzled with the idea of time travel, throughout most of his life, he was a firm believer that it wasn’t possible, moreover, Hawking released a challenge to the world of physics to find out a law that would deny the possibility of time traveling, he called it “ Chronology protection conjecture”. The professor, later on, found a cunning way to prove his conjecture, which I will explain in a very simple manner:
How did Hawking prove his Chronology Protection Conjecture?’ Hawking explained:
I have experimental evidence that time travel is not possible. ‘I gave a party for time-travelers, but I didn’t send out the invitations until after the party.
‘I sat there a long time, but no one came.
However, despite all the effort from Hawking, and other scientists, they still couldn’t reach a way that time travel wasn’t possible, his lead Hawking to change his mind, because there were more chances of it being possible than not, due to the fact that time travel doesn’t directly defy any law.
The First TIME-MACHINE
The first time machine involved something called a Verm Hole, which by Einstein equations, can connect to points in time, so if you entered a Verm Hole, you could actually go back in time. However, this idea has a bit of a problem, because, generally speaking, Black holes are a one-way ticket Ride,most scientists actually believe this hypothesis is possible, but the problem wouldn’t be entering the Blackhole, but to have to capability to exit and take the credits of going back in time.
Einstein In action!
In 1949 a famous mathematician named Kurt Godel found out another possible solution for time travel, this involved Einstein equation to come to the rescue. Einstein states that time varies with speed, for example, the mathematician stated that if the Universe spins if we travel around it with sufficient speed, we could actually travel back in time.
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This brings to mind the idea of traveling to the future if someone, for example, could travel around the earth, with a faster speed than the rotation speed of the earth, when this person came back to Earth he would have arrived in the future.
Theory of Everything
In 1997, the debate on time-traveling got a bit more clarified, with the likes of Bernard Kay, Marek Radzikowski and Robert Wald showing that the idea of time travel was consistent with the laws of physics, except in one place. Inside Verm Hole, both Einstein equations and quantum theory can’t work out most of the problems alone. Unless they are used together, but when used together we achieve a lot of results that don´t make any sense. It’s here where the theory of everything becomes relevant, the way to achieve the key for a compressed time travel theory is with a Unified Theory, that we still haven’t reached. A theory that unifies all 4 Forces of the universe, that would allow us to calculate everything with maximum precision, this idea has been researched but still with no significant steps forward, an example is String theory that all the ideas seem plausible, but we can’t prove it.
In conclusion, with everything said, we can clearly see that the most promising idea is Verm Hole, theoretically, Verm Holes could make you move Faster than the speed of light, which would permit the idea of Time-Travel, but Verm Holes could have the dimensions of an Atom, and we still can´t figure out how they work, only with a Unified Field Theory can scientists actually make a big step towards Time-Travelling, which means that time-traveling is only a Present Imagination.
“[Time Travel] It’s against reason,” said Filby.
“What reason?” said the Time Traveller.”
― H.G. Wells, The Time Machine
At the end of each of my articles, I like to advise you on some writers that have done some articles related to this topic, or with general physics/Science Fiction that I really enjoyed reading: