Back to the future, Terminator, The Philadelphia experiment , The end of the countdown and, of course, The time machine. All these films focus on the possibility of moving through time, both forward and backward. But in the digital world we find many other stories, which involve time travel. And why not? It is one of the most mysterious concepts that man has invented. Travels in the time. But is it a possibility?
For according to the astrophysicist Ethan Siegel, within the realms of Einstein’s General Relativity, a person can travel through a wormhole and go back in time.
It is possible to travel to the past
In a publication for the American magazine Forbes entitled “How to travel back in time could be physically possible,” Ethan Siegel of Lewis & Clark College, Portland, Oregon, explains that, by using the laws of theoretical physics, we could technically build elaborate wormholes that could send humans back to the past.
As Spiegel points out, space-time tissue experiences constant positive and negative fluctuations. Theoretically, a strong positive fluctuation and a powerful negative fluctuation could be connected to form a quantum wormhole. The wormhole can be converted into a passageway that can transport particles from one point in spacetime to another. But this only works if the wormhole gets to resist enough for that time travel to happen.
But creating a wormhole big enough to take a person from the present to the past will not be easy, says Spiegel. So far, the search for the negative energy particles has not been successful.
“While every known particle in our Universe has positive energy and a positive or zero mass, it is eminently possible to have negative mass / energy particles within the framework of General Relativity,” writes the astrophysicist. “Of course, we have not discovered any yet, but according to all the rules of theoretical physics, there is nothing that forbids it.”
So, to travel through time we would need to apply the laws of special relativity . When traveling at speeds close to the speed of light, a phenomenon called temporary dilation occurs. This means that as the person increases their movement through space, their movement through time will decrease.
For example, if you traveled to a star that was 40 light-years away at speeds close to that of light, you can get there in one year and take a year to return. But, according to Spiegel, when you have returned to Earth, 82 years will have passed.
“This is the standard way in which time travel works physically: it takes you to the future, with the amount of forward travel in time that depends solely on your movement through space,”Siegel explains.
But your quantum theory of the wormhole changes that and avoids the “grandfather paradox” , that is, the notion that you can change the course of your life through time travel backing up in time and killing your grandfather. The first time this theory was postulated was in the novel by René Barjavel titled “Le Voyageur imprudent (1943)” . In essence, Barjavel explains that a person can not travel back in time to kill his own grandfather before having children. Because if he kills his grandfather before he has children, then his son would not be born, nor the father, and finally the person. So, if that person was never born, how could he have gone back in time to kill your grandfather?
“Even if the wormhole was created before your parents were conceived, there is no way you exist at the other end of the wormhole early enough to return and find your grandfather before that critical moment , ” he says. Spiegel.
However, this is not the first time that scientists have theorized somewhat viable ways of traveling through time. Astronomer Frank J. Tipler invented a device, called a Tipler cylinder, where you roll the matter into a long, dense cylinder. Tipler theorized that when matter is rotated at a few billion revolutions per minute, a spacecraft that orbits the cylinder could be locked in a “closed curve, similar to time” that would facilitate time travel.
In addition, scientists have spent years behind making travel possible over time. Moreover, in 2014 Robert Nemiroff and Teresa Wilson, from the Technological University of Michigan, began to look for weather travelers on the Internet . They believed that, if a person learned to travel in time in the future, and if he passed through our timeline, he should have left some kind of “trace on the network” . For “the hunt of time travelers on the Internet,” Nemiroff and Wilson devised three ingenious search schemes. It seems that the scientific community is taking time trips very seriously, possibly because what awaits us in the future is not pleasant at all. It’s a posibility.
Do you agree with Spiegel’s theory? Is it possible to travel to the past? And the future? Do not hesitate to comment below.