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Time travel without paradoxes proved possible by the physics student

The rules of time travel have been debated for years by scientists and science fiction enthusiasts, but now a student physicist has been able to “deal with the numbers” to show how paradoxical time travel is theoretically possible. This means that if someone were able to time travel, the dreaded butterfly effect might not be as inevitable as feared, but that doesn’t mean a time traveler might not face unintended consequences yet. in Classical and Quantum Gravity, University of Queensland student Germain Tobar, collaborating with university physics professor Fabio Costa, mathematically discovered how “time travel with free will is logically possible in our universe without any paradox. “.

The math involved in all of this is enough to make Will Hunting scratch his head but Tobar, like a different Matt Damon character, was able to “do science”

; by theorising how one can travel through time without causing those annoying logical paradoxes that haunts many science fiction protagonists.One such example is the so-called grandfather paradox in which, as their article says, “a time traveler could kill his own grandfather and thereby prevent his own birth, leading to a logical inconsistency.” Or, someone going back in time to prevent the COVID-19 pandemic from occurring would undo the very reason they traveled through time. Yep, it’s like those time travel discussions in Avengers: Endgame again!

“This is a paradox – an incongruity that often leads people to think that time travel can’t happen in our universe,” Costa said. “Some physicists say it is possible, but logically it is difficult to accept because it would affect our freedom to take any arbitrary action. It would mean that you can travel in time, but you cannot do anything that would cause a paradox.”

Tobar basically said, keep my beer and went on to demonstrate that, in theory, one can travel through time, exercise free will and create no such logical paradox.

Since classical dynamics and Einstein’s Theory of Relativity conflict with each other on the subject, Tobar’s paper calculated that closed time-like curves (CTCs) “are not only compatible with determinism and free choice. local operations, but with a rich and diverse range of dynamic scenarios and processes “.

Or, as Popular Mechanics puts it succinctly, “as long as only two parts of an entire scenario within a CTC are still in” causal order “when you leave, the rest are subject to local free will.”

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Tobar’s calculations show how theoretically one can travel through time and exercise free will in a way that would not prevent why they went back in time. But it might make them wish they had never time traveled to begin with:

“In the coronavirus patient zero example, you could try to prevent patient zero from getting infected, but by doing so you would catch the virus and become patient zero, or someone else would. Whatever you did, they would. salient events will simply recalibrate around you. As much as you may create a paradox, events will always adapt by themselves, to avoid any inconsistency. “

In the words of those venerable time travel experts Bill S. Preston, Esq. And Ted “Theodore” Logan: phony!

For more scientific coverage, discover the possibility of life on Venus, evidence of a parallel universe where time runs backwards, why the moon rusts, and the discovery of underground lakes on Mars.

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