Physicist Says You Can Do Time Travel But…

A physics student at the University of Queensland recently published a paper indicating they’d ‘squared’ the maths when it involves time travel. Not only should it theoretically be possible to travel back in time, consistent with the numbers, but you can do whatever you would like without making any fundamental changes in present.

In other words: the ‘paradox of time travel‘ might not be real.

The problem goes like this: your eccentric old scientist buddy turns a DeLorean into time machine . Before he can teach you ways to use it properly, he’s murdered by terrorists. While fleeing the scene in said DeLorean you mistakenly travel back in time to the month before your parents fell crazy &, whoops wouldn’t you knew it, you unintentionally screw things up. Now they could not kiss at big dance & ending up having kids, so your very existence hinges upon your ability to right the wrongs you’ve caused so you could get- back to future.

That’s the ‘paradox of time travel.’ Put less verbose: a time traveler’s actions in past could cause a ripple effect that creates their purpose for time travel either not exist in present they came from or causes the traveler themselves not exist (also called the ‘grandfather paradox‘).

According to Germain Tobar, the undergrad who crunched the numbers & wrote research paper titled “Reversible dynamics with closed time-like curves and freedom of choice” that was recently published in Classical & Quantum Gravity journal, back to future plot gets time travel all wrong.

Per the paper:
We have developed a characterization of deterministic processes in presence of closed time-like curves (CTCs) for an arbitrary number of localized regions. Our proofs have demonstrated that non-trivial time travel between multiple regions is according to the absence of a logical paradox as long as once the outputs of about 2 regions are fixed, at the most 1 way signaling is possible .
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