According to a new study, time travel is—mathematically
speaking—possible. A researcher has concluded that space should NOT be divided
into three dimensions—where time is separated. Instead, four dimensions need to
be imagined simultaneously as a space-time continuum in which the different
directions are connected.

While time travel has only been possible in popular movies
and books, a scientist has found that in reality, there’s more to time travel
than what we previously believed.

A researcher has created a new, revolutionary model that
reveals—mathematically—time travel is in fact possible. While it seems to work
mathematically, experts have yet to come up with the ‘right’ materials to
create a working ‘time machine’. The study was recently published in the IOPscience Journal Classical and Quantum Gravity and argues that mathematically speaking we can
travel in time: In this paper, we present geometry which has been designed
to fit a layperson’s description of a ‘time machine’. It is a box which allows
those within it to travel backwards and forwards through time and space, as
interpreted by an external observer. Time like observers travel within the
interior of a ‘bubble’ of geometry which moves along a circular, a causal
trajectory through space time. If certain time like observers inside the bubble
maintain a persistent acceleration, their world lines will close.

Our analysis includes a description of the causal structure
of our spacetime, as well as a discussion of its physicality. The inclusion of
such a bubble in a spacetime will render the background spacetime
non-orientable, generating additional consistency constraints for formulations
of the initial value problem. The spacetime geometry is geodesically
incomplete, contains naked singularities, and requires exotic matter. (Source)

Ben Tippett, a mathematics and physics instructor at the University of British Columbia’s Okanagan campus has revealed that time travel is at least mathematically possible.

Ben Tippett, a mathematics and physics instructor at the University of British Columbia’s Okanagan campus has revealed that time travel is at least mathematically possible.

“People think of time travel as something of fiction, and we
tend to think it’s not possible because we don’t actually do it. But
mathematically, it is possible,” revealed Tippett.

According to a newly published study, Tippet concludes that space should NOT be divided into three dimensions—where time is separated. Instead, Tippett says four dimensions need to be imagined simultaneously as a space-time continuum in which the different directions are connected. Time travel. Based on Einstein’s theory—the researchers argues that the curvature of space-time is responsible for the curved orbits of the planets in the universe. The researcher argues that if space-time was not ‘curved’ planets in the universe would travel in a straight line. Imagine yourself standing next to a MASSIVE STAR. There, space-time geometry becomes curved making all straight trajectories of nearby cosmic bodies to bend, following a curved path around the star.

According to a newly published study, Tippet concludes that space should NOT be divided into three dimensions—where time is separated. Instead, Tippett says four dimensions need to be imagined simultaneously as a space-time continuum in which the different directions are connected. Time travel. Based on Einstein’s theory—the researchers argues that the curvature of space-time is responsible for the curved orbits of the planets in the universe. The researcher argues that if space-time was not ‘curved’ planets in the universe would travel in a straight line. Imagine yourself standing next to a MASSIVE STAR. There, space-time geometry becomes curved making all straight trajectories of nearby cosmic bodies to bend, following a curved path around the star.

“The time direction of the space-time surface also shows
curvature. There is evidence showing the closer to a black hole we get, time
moves slower,” says Tippett. “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. That circle takes us back in time.”

For the study, Tippett came up with a mathematical model
called Traversable Acausal Retrograde Domain in Space-time or more
charismatically called TARDIS. Tippett
describes it as a bubble of space-time geometry which is able to carry contents
back and forth through space. This ‘bubble’ moves through space-time at a speed
greater than the speed of light times 8, which consequently allows it to move
backward in time.

“Studying space-time is both fascinating and problematic.
And it’s also a fun way to use math and physics,” says Tippett. “Experts in my
field have been exploring the possibility of mathematical time machines since
1949. And my research presents a new method for doing it.”

However, while the researcher says its mathematically
possible to travel in time, he doubts that anyone will ever build a working
time machine in the near future.

“HG Wells popularized the term ‘time machine’ and he left
people with the thought that an explorer would need a ‘machine or special box’
to actually accomplish time travel,” Tippett says. While it is mathematically feasible, it is not yet possible
to build a space-time machine because we need materials – which we call exotic
matter – to bend space-time in these impossible ways, but they have yet to be
discovered,” concluded Tippett.

Source: Traversable acausal retrograde domains in space time, Reference: UBC instructor uses math to investigate possibility of time travel

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