Time travel is possible!

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[EN VIDÉO] The universe, a time machine?
The Alma Radio Telescope, located 5,000 meters away in the Atacama Desert in Chile, spying on radio signals from afar, was emitted by the first galaxy in the young universe billions of years ago. Because looking away is looking at the past …

The Time travel. Admit it too, it makes you dream a little. Opportunity to correct mistakes made in the past. Or get a glimpse of the future. I have been enjoying science fiction for a long time. But what does science say about it? To understand this, Barak Shoshani has proposed to us today, a Physicist at Brock University (Canada).

Let us first recall that this is the theory of general relativity which is raised by Physicist German Albert Einstein (1879-1955) which has now been defined for over 100 years, combining space and time. Thus it brings a complex explanation of causal principle. And it turns out he agreed to write Equation Which coherently describes time travel. “But equations don’t make sense if they don’t actually match anything.”Barak Shoshani, In Conversation.

Is that what you have to say? Well first, let’s notice that to create a time machine, equations physicists have to use negative energy substances. However, negative energy is not found in every street corner. There is hardly any current state of our knowledge Quantum mechanics Which we hope to be able to create in theoretically any case, in very small quantities and for a very short time. But Barak Shoshani wants to be optimistic: “This problem may simply be due to our current technology or our limitations in understanding Quantum mechanics. A

Difficulty overcoming time to go back

So let’s sweep the problem of matter with negative energy. But another major hurdle remains. One we’ve all heard before. The coherent paradox is that. The physicist gave an interesting example. He imagined using a time machine that he had created to go back five minutes in time. There he destroys the device. However, the destroyed machine should not let him use it after five minutes so as to come back five minutes earlier and destroy it. When he is there, it means that the time machine has not been destroyed. And he could use it to go back in time and destroy her. In other words, there is a time machine that is destroyed if and only if … it is not destroyed. That’s great! Do you see inconsistencies?

The Science fiction It dealt with the issue by advising travelers during its time to avoid interference in the past. Or to meet ourselves. Problem solving. Without that in Physical, A paradox coincides with a purely theoretical concept. Understand that he inserts The light The theory itself is an inconsistency. And hell! This is how time travel becomes impossible Eyes Science.

Impossible, really? Inevitably, according to some researchers. Russian theoretical physicist Igor Dmitrievich Novikov is one of them. His self-consistency assumptions were made to solve the paradox of time travel. Prohibits time travelers … changes the past. Really forbidden. In any case with the laws of physics, Barack conspires to prevent Shoshani from destroying his time machine five minutes before it enters. But then, is it good? Wouldn’t it be possible to go back to the past?

The end of the coherent paradox of time travel

In addition, the work performed by Barak Shoshani shows that self-consistency assumptions do not eliminate all opposition to time travel. So back to square one? Has time travel become impossible? Well, not quite, the physicist told us.

The final solution would be to create multiple stories. Or parallel timeline. Which means? Quite simply, when the Time Traveler exits his machine, he enters a different timeline from his original timeline. In this new timeline he is free from everything. Including the destruction of his time machine. And this, without any effect on what happens, is a little later, in the timeline from which it comes. This is the end of the paradox. And science that combines science fiction with those that were already fond of parallel chronological stories.

More convincing that time travel may be possible

“I have been working on the paradox of time travel for the last three years and I am becoming more and more convinced that time travel can be possible.Barak Shoshani says. But only if ours The world Multiple stories can allow coexistence. A Which, of course, raises a new question: Can our universe adopt a parallel timeline?

Quantum mechanics seems to be leaning towards yes. Multiple world theory conceived by the American mathematician Hugues Everett (1930-1982). The story may be divided. To allow Schrodinger’s cat Living in one new story and dead in another.

Barack Shoshani’s team is currently working to establish a concrete theory of time travel with multiple histories consistent with Albert Einstein’s general relativity. A theory that cannot yet prove that time travel is possible, but at least it has not been made impossible by the paradox of consistency.

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