We have seen lot of science fiction movies that gives us the idea about time travel. But in reality, it might be more feasible than you’d think.
Since HG Wells first popularized the idea in 1885, time travel has remained a steady theme in science fiction.
Physicists have developed a new mathematical model that shows how time travel is theoretically possible. They used Einstein’s Theory of General Relativity as a springboard for their hypothetical device, which they call a Traversable Acausal Retrograde Domain in Space-time (TARDIS).
Traditionally, we think of the universe as being made up of three spatial dimensions, and a fourth dimension representing time. But mathematician Ben Tippett at the University of British Columbia, Canada, says this is wrong. He believes time should not be separated from other three spatial dimensions—instead all four run together, simultaneously.
Working with David Tsang, an astrophysicist from the University of Maryland, he has worked out a way to use this principle to make time travel possible. Their findings have now been published in the journal Classical and Quantum Gravity.
Based on Einstein’s theory, the researcher says the curvature of space-time accounts for the curved orbits of the planets.
If space-time were not curved, planets and stars would move in straight lines, he argues. So, near a massive star, space-time geometry becomes curved, causing the straight trajectories of nearby planets to bend to follow the curvature around the star.
“My model of a time machine uses the curved space-time to bend time into a circle for the passengers, not in a straight line,” Tippet explained. “That circle takes us back in time.” Simply put, their model assumes that time could curve around high-mass objects in the same way that physical space does in the universe.
While it is mathematically feasible, it is not yet possible to build a space-time machine because we need materials – which is called exotic matter – to bend space-time in these impossible ways, but they have yet to be discovered.