Expert: Time Travel Is Theoretically Possible


 Many people confess and tell stories that they experience time travel or time travel. On TikTok, Javier was even said to be stuck in 2027.

There are also many films that raise the issue of time travel, Indonesia also has one of the famous 'Lorong Time'. The concept of a time traveler is indeed quite interesting, so what do physicists think about this?


Handikha S. Ramadhan, Ph.D, a Physics Lecturer at the University of Indonesia, told us that although she hoped that time travel would not be possible on the grounds of violating causality, in theory it turns out that there is a possibility.



"In Einstein's theory of relativity, time travel is possible theoretically. For example, in Einstein's theory of general relativity, if we make a closed timelike curve, then we go back to past. That's theoretically," said Handhika, who took his doctorate at Tufts University.



"There is a serious study, according to the laws of physics, maybe we don't make a time machine in theory, not technology. If we want to make space and time curve to form a closed timelike curve, we need exotic material. Exotic matter is material that has a negative pressure or negative pressure," he continued.


In general, although no exotic material can create a closed timelike curve, it is quantumly possible. Stephen Hawking has even calculated the possibility of making a time machine, the results also say a glimmer of hope, although the possibility is small.


"In the last paragraph of Hawking's paper he says, 'it seems like a law of physics conspire to prevent the violation of causality'. The existing laws of physics, quantum relativity and quantum mechanics seem to conspire to prohibit time travel. I'm more inclined to stick to that theory, yes," he concluded.

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