" Interstellar " released in 2014 is still regarded as a masterpiece. In addition to being a brain-burning and exquisite plot, can withstand the "wormhole" in the movie should be the most interested in . After all, traveling through time and space has become the hottest topic of this era.
In Interstellar, the picture of the spacecraft crossing the wormhole
Of course, most people think this is just an exaggeration effect of a "science fiction film" and is not true. But before , Harvard scientists made it clear that wormholes are real and humans can travel through, but there is one of them, , which is just .
So, what's going on? Can humans really rely on wormholes to complete their time travel?
wormhole concept diagram
wormhole?
To understand how wormholes help people travel through time, we must first know what it is.
In the early 2000s, the emergence of Einstein opened a new perspective for people to observe the universe. Twenty years after the proposed general relativity , Einstein and Nathan Rosen discovered a special solution to the general relativity equation, and therefore proposed " Einstein-Rosen Bridge " .
At that time, everyone didn't agree with it, but didn't expect that this was the predecessor of the "wormhole".
Einstein (left) and Nathan Rosen (right)
From the name "Einstein-Rosen Bridge", it is not difficult to see that the wormhole is essentially like a "bridge" connecting two space-time and space . However, it was difficult for people to describe the bridge at that time, so scientist John Wheeler came up with another "description", and compared it to the "hole" in Apple .
data shows that John Wheeler said this: "If an ant crawls over one end of the apple from one end to the other, the distance will be very far. If you bite through the apple and drill through the inside of the apple, the distance will be greatly shortened, and thus the term "wormhole" in astrophysics is proposed."
John Wheeler and wormhole diagram
As for the process of wormhole production, scientists believe that this is related to the various "cosmic bubbles" that appear in the expansion of the universe. In their eyes, the explosion and expansion of actually exploded many "small universes" . You can regard it as what we often call parallel space-time. and the "wormhole" is connected to these space-time.
In addition to this, there are many types of wormholes, such as the "Lorentz Wormhole" that can be passed through, and the "Euclid Wormhole" that can be passed through instantly. These wormholes have different qualities, but they can all become the "media" for humans to travel through time and space.
Wormhole or a space-time tube connecting different universes
. After long-term research, scientists have gained new views on wormholes. For example, Harvard scientists claim that wormholes really exist and humans can travel through it, but before traveling through it, we must face a fatal drawback . So, what is this so-called disadvantage?
Wormholes can be used for people to travel through, but there are disadvantages
From the definition of the concept and function of wormholes by scientists, it can be seen that wormholes are indeed somewhat like the "arbitrary door" in the universe. When you open this door, you can reach another time and space . Of course, this function looks very beautiful in theory, but when it comes to "time travel", it is not that simple.
In this regard, Harvard physicist Daniel Jafferis, who has conducted a lot of research, put forward his own view. He believes that although wormholes can allow humans to travel successfully in theory, , the time required to travel through it is probably unimaginable to us, and it is much longer than the normal time it is speculated.
Physics Professor Daniel Javeris
In our opinion, this does not seem to be a fatal disadvantage. After all, as long as you can complete time travel, what can you do in this channel for a longer time?
If it is an ordinary tunnel, of course it is OK, but this is a wormhole. , like a black hole, contains countless unknown places . In this case, staying in for more than one minute means that the risk that takes on is several times larger than .
Schematic diagram of the internal structure of the wormhole
Therefore, after Harvard scientists proposed that it takes longer to travel, immediately mentioned the most dangerous thing in the wormhole - "negative energy" , which is the fatal disadvantage of the wormhole.
According to the current research situation, humans know very little about negative energy, and what will become of humans after entering it will become under its influence .
Negative energy can stabilize wormholes
Of course, in addition to these disadvantages raised by Harvard scientists, faces much more difficulties in using wormholes to travel through than we imagine. It is no exaggeration to say that even if it really exists and is placed in front of people, humans dare not enter and use it to travel through time.
After all, no one knows what will happen after entering. How to keep the wormhole stable and let people find the correct export of is also an unsolvable problem.
"It is not easy to enter the future or return to the past with the help of traversable wormholes, because it takes a lot of effort to transform wormholes into time machines, and it is also extremely difficult to get rid of wormholes." said American astrophysicist Eric Davis.
Do you really dare to enter that wormhole full of unknowns?
To sum up, although scientists are very concerned about wormholes like us, , but if you want to "perfectly utilize" it, you may have to wait a hundred years or even longer for .
So, what are the conditions required for the "safety wormhole" in the eyes of scientists?
"Safe Wormhole" requires the conditions
In the above article, we mentioned the disadvantages related to wormholes described by scientists and understood the reasons why it cannot become a medium for humans to travel through time today. After scientists understood the shortcomings of wormholes, they began to deduce in reverse, trying to build an "safe wormhole" model . This model must meet the following conditions.
Can future humans really create wormholes?
The first is that wormholes must have stable traits . It is not necessary to become an Euclidean wormhole for us to travel through instantly, but at least it will last longer. It cannot be closed or disappeared before the matter has completed its passage.
The second is that there should not be any "event horizon" inside the wormhole, only in this way can people walk freely through it.
Event Horizon is a space-time dividing line
Finally, the length of the wormhole should not be too long to ensure that people can travel through it in a limited time . As we said in the previous article, the longer you stay in a wormhole, the greater the risk.
