Go back five years, get ahead a decade, move around time-space at ease. One of the chimeras of physics, one of the main themes of books and science fiction films. The time machine became an object of worship, an impossible dream that materialized strongly in the saga 'Back to the Future'. However, Marty McFly's adventures in the past, once outlandish, now find a scientific basis.
Two men of science published an article in the Journal and Quantum Gravity in which they propose a mathematical model for a potential time machine. A machine that would allow to move in time-space thanks to the "manipulation" of gravity.
Ben Tippet and David Tsang argued that beyond the general public to consider travels in time as a science fiction object, "they are mathematically possible." "Our model of a time machine uses the time-space curves caused by gravity so that time is not a straight line," they said in a statement.
They baptized the possible machine like TARDIS, that by means of its initials in English means Time and Relative Dimensions in the Space, in allusion to the popular ship that they use in the series of British science fiction Doctor Who. In TARDIS one could apply the mathematical formula taken by Albert Einstein's general theory of relativity.
Scientists believe it is feasible to create a bubble in a context where the force of gravity is very high.
If that bubble is able to reach a speed greater than that of light - possible, according to them - users would travel in time as the ship would move back and forth in a circular path.
In "flat" space-time, planets and stars move in straight lines. In the vicinity of a massive star, space-time geometry curves and the straight paths of the nearby planets would follow the curvature and bend around the star. "The temporal direction of the space-time surface also shows curvature. There is evidence that the closer we are to a black hole, the slower it moves," Tippett told Science Daily. "My model of a time machine uses curved space-time to bend time in a circle, not in a straight line. That circle goes back in time."
Beyond enthusiasm, both Tippet and Tsang warned that building such a bubble today is not possible because it would require such extraneous materials that are not yet known.
"While it is mathematically possible, we still can not build the time machine because we need materials, known as exotic materials, to bend spacetime, which have not yet been discovered," they added. However, the research presents an overcoming method for time travel; An idea that has been studied since 1949.