Chapter 3-The Theory of Time Reversal
In the normal world, the passage of time is like a river flowing. We can only be carried by this river, but we can actually move against the flow of the river.
There was also evidence in the experiments of physicists that time could be reversed: On December 7, 1996, researchers at the European Atomic Energy Research Center discovered that there was a time imbalance in the conversion process of positive and negative K mesons. Their experimental observations proved for the first time that, at least during the decay of neutral kaon, time violated the symmetries. This was the first time in the history of physics that a time imbalance had been directly observed, and it proved that time could be reversed.
Mesons were a type of particle with a mass greater than electrons but smaller than neutrons and neutrons. They had an integral spin and participated in the strong interaction. According to the internal quantum number, they could be divided into pions, rho mesons, and kaons. In experiments, the researchers found that the rate at which anti-K mesons were converted into K mesons was faster than the time reversal process, which was the conversion of K mesons into anti-K mesons. (2) In daily life, time cannot be turned back. The arrow of time always had only one direction. The old could not become young, the broken vase could not be restored, and the past and the future were clearly separated. But in the eyes of physicists, time could be reversed. For example, when a pair of photons collided to produce an electron and a positive electron, the positive and negative electrons would also produce a pair of photons. This process was in accordance with the basic laws of physics and was symmetrical in time. If one of the two processes was recorded with a camera and then played, the viewer would not be able to determine whether the videotape was played forward or backward. In this sense, time had no direction. In physics, this characteristic of not being able to distinguish between the past and the future was called time symmetries.
On the other hand, the mystery of some of the super-abnormal " premonitions " of humans must also be based on the " time reversal " theory in order to be reasonably explained in science. For example, the famous American Edgar? Edgar Cayce's prophecy about the future of mankind was not worth mentioning here.
The late famous American President Lincoln was assassinated on April 15, 1865 after he commanded and won the Civil War. This was a well-known historical fact. Fourteen days before his death, Lincoln had a premonition that he was going to die, and he spoke of his premonition at a gathering of his closest people. This was also a well-known fact in the United States. On the night of April 1, Lincoln had a nightmare. He was walking in the corridors of the White House and heard many people crying sadly. He walked out of his room, passed one room after another, and finally came to a room. He saw a stretcher in the middle of the room. There was a body on the stretcher, surrounded by people who were crying. He asked a soldier who had died, and the soldier replied that the president had been assassinated! Lincoln woke up and told his wife about it. The next day, he told the people close to him. Everyone was very uneasy. Who would have thought that 14 days later, Lincoln's premonition would become a reality. He was shot while watching a show in a theater box...
The world-shaking American blockbuster "Titanic" once again showed people the soul-stirring scene of a shipwreck in the ice sea more than a hundred years ago. However, who knew that long before the ship's maiden voyage, someone had already predicted that the ship would sink and gave up on the Titanic's maiden voyage ticket. Was this the famous industrialist Jory? Okuna. A week before the Titanic set sail, in the club of the London meeting of industrialists, when Jory? After Okuna said that he would give up the ticket for the first flight of the Titanic, a large group of people immediately surrounded Okuna, wanting to get a refund. "Mr. O'Kuna," someone asked in confusion,"you know that there are many passengers on the maiden voyage of the Titanic. Only those famous people and their families can get this honor. It's a pity that you give up!"”Mr. Okuna stammered for a long time before he finally spoke the truth."I had a weird dream. I saw the Titanic capsize!”Everyone laughed when they heard it. The Titanic was the largest and most luxurious high-class passenger ship in the world at that time. It weighed 43600 tons and had a double-deck bottom and 16 sealed cabins. It was considered an unsinkable passenger ship. Okuna trusted his hunch and didn't apply for another ticket. At noon on April 10th, 1912, the Titanic departed Southampton Harbor for New York City. Unexpectedly, five days later, on April 15th, it hit an iceberg in Newfoundland Island in the Atlantic Ocean, and 1513 people died at sea...
This was not the first time he had a hunch about the sinking of the Titanic. In 1898, the British writer Morgan? Robson wrote a novel called "Useless Work." The novel was about a luxury ship known as the Titan, which sailed from England to the United States on the other side of the ocean. This was the largest and most luxurious passenger ship in the history of human navigation. The ship was equipped with all the luxurious facilities that could be done at that time. The ship was full of rich passengers, and people enjoyed themselves on this huge ship. However, the ship hit an iceberg on its first voyage and sank tragically. Many passengers were buried at the bottom of the sea. No one expected that the story written in this novel would become the unfortunate reality fourteen years later. On the night of April 14th, 1912, the largest luxury liner at the time, the Titanic, sank after hitting an iceberg. After the tragedy, someone thought of the novel and found that other than the ship's name being almost the same, there were many similarities between the two: Both ships sank on their first voyage because they hit an iceberg in the North Atlantic Ocean. Both ships sailed in April, and the route was from England to the United States. The Titan had 3,000 passengers and crew, while the Titanic had nearly 3,000 passengers and crew. Titan was supposed to weigh 70,000 tons, but Titanic actually weighed 66,000 tons. The Titan was 800 feet long, while the Titanic was slightly longer. Both ships had three propellers, and they were traveling at 23 miles per hour when they hit the iceberg. Another similarity was that the reason for the heavy casualties of the passengers after the accident was that there were not enough lifeboats on board. Someone compared the news of the sinking of the Titanic published in The New York Times. The plot and process were exactly the same as those in Robson's novel. It could even be said that the story in the novel was a portrait of the sinking of the Titanic, which appeared fourteen years earlier. Was all of this just a coincidence? (After the tragedy, the author committed suicide.）
There was also a real and magical dream that had been studied as an important piece of information by scientists who studied human death in various countries. The dreamer was an American woman, Miss Rozdesun, who lived in St. Louis. Once, she went to Chicago to visit a friend who lived in a rural area about 30 kilometers away from Boston. She stayed there for a night. In the middle of the night, she was sleeping soundly. Suddenly, she was awakened by a voice. In her haziness, she seemed to hear the big iron gate in the garden open, and then a carriage rushed into the courtyard. Surprised, she walked to the window and lifted the curtains to look out. The carriage was full of people, and the driver was a tall and ugly man. He waved at her and shouted,"There's room for one more.”She took a closer look and saw that it was a hearse. She suddenly woke up. It turned out to be a dream. At dawn, she hurried on her way. When she arrived at a supermarket in Chicago, she wanted to take the elevator upstairs. At this time, there were already a few people waiting in the elevator. She was about to enter when she suddenly saw the elevator operator who was the one who drove the hearse last night. He saw her wave his hand and shouted,"One more person can enter. Please come in, Miss.”She was so scared that she turned around and ran. Not long after, there was a loud bang and a tragedy happened. Everyone in the elevator fell down and their bones were shattered.
The 23-year-old booth was working in the United States, in the city of Vinci in the state of Texas. In May 1979, he had the same dream for 10 consecutive nights. He dreamed that an American Airlines passenger plane was swaying in the air and would fall to the ground at any time, forming a fireball. "It's like I've seen it myself," said booth."It's like watching TV.”On May 22, 1979, he notified the Federal Air Administration and also called American Airlines. On May 26th, an American Airlines jet crashed at Chicago O'Hare International Airport, killing 275 people on the spot. It was the largest air crash in the history of the United States.
Actually, there are many such cases, and I've experienced it at least three times. The essence of humans 'ability to predict the future was the ability to capture information across time and space (this was obviously the seventh sense that humans had evolved to better adapt to the unpredictable natural living environment), and any information transmission required material as a medium. Since information could be "returned" to the present from the future, then the matter itself should be able to do the same. (However, the information we sensed did not come from the future world in our universe, but from a parallel universe. The answer will be found later. Please read patiently.)）
Even in the field of philosophy, the conclusion drawn from the principle of metaphysics was the same: Everything that existed in the world often had two completely opposite characteristics! This was the most universal objective truth in the world! If there was a universe, then there must be a parallel universe. If there was gravity, then there must be repulsion. If there was matter, then there must be antimatter. If there was normal visible matter, then there must be dark matter. If there was a celestial body that emitted light, then there must be a celestial body that received light. If there was a black hole, there must be a white hole. If there was a positive charge, then there must be a negative charge. If there was a conductor, then there must be a non-conductor. If there was a perfect conductor, then there must be a semiconductor. If there were non-living things, then there must be living things. If there were pronuclear life forms, then there must be eunuclear life forms. If there were single-celled life forms, then there must be multicellularized life forms. If there were plant life, then there must be animal life. If there was asexual reproduction, then there must be sexual reproduction. If there were males, then there must be females. If there were aquatic animals, then there must be terrestrial animals. If there were vegetarian animals, then there must be carnivorous animals. If there were vertebrae, then there must also be invertebrae. If there were low-level animals, then there must be high-level animals. If there was in vitro-fertilisation, then there must be in vitro-fertilisation. If there were egg-laying animals, then there must be live-bearing animals. If there was a Unitreme, then there must be a Ditreme. If there were non-intelligent animals, then there must be intelligent animals. If there were intelligent life forms on Earth, then there must be extraterrestrial intelligent life forms. In the first human fertilized eggs, the process of division like the nuclear chain reaction actually had the characteristics of the unity of opposites. In addition, among all the physiological structures of the human body: Up and down, left and right, on the macro and micro levels, every organ had its opposite organ…As the saying goes, yin and yang in the world reinforce and restrain each other. Solitary yang does not grow, solitary yin does not grow, and everything has its opposite. Since the time in the normal world was positive, then in theory, there should be a phenomenon of time reversal under certain special circumstances. (I even think that there might be such a universe: The direction of time is completely opposite to our world.）
Secondly, in theory, time reversal also met certain conditions. The theory of relativity allowed one to travel through the past. According to the general theory of relativity, space-time could be bent to the point where it was connected to itself, so it could create a " closed curve " in time and space.
The first person to draw a closed time curve was a friend of Einstein's, the Austrian mathematician Coulter? It was the first time he had seen such a person. When he was solving the equations of the gravitational field in the theory of relativity, he found that a spiral orbit leading to the rotating universe could be found in space. However, the answer to the equation he solved required the assumption that the universe was in a state of rotation, but today people believed that the universe did not rotate. However, his contribution was to prove that the theory of relativity did not rule out a particle of matter. Theoretically, it also included humans. They could go to the past and return to the future.”In fact, Godel wrote," By traveling in a ship along a wide enough route, we can go to any place in the past, present, or future and return.”After reading the results of his friend's solution, Einstein admitted that the possibility of a closed curve in space-time that could allow people to go back to the past had tortured him for a long time during the process of conceiving the general theory of relativity. But Godel's idea was based on the wrong premise that the universe was rotating. If that's the case, how can we enter the past? Fortunately, Godel's spin theory isn't the only way we can visit the ancient past.
In fact, under the objective situation of the non-rotating universe, there were at least two ways to achieve time reversal in theory: One was superluminal speed, and the other was a wormhole.
According to Einstein's famous energy-mass relation, E= mc2, it was entirely possible to travel through the time tunnel from the present to the past. In 1905, Einstein explained a strange world in his special theory of relativity: The universe we live in can be seen as a four-dimensional space-time. As the speed of objects increases, the flow of time will slow down and the scale of space will shrink. Like the three-dimensional space, time was a variable dimension. This was also the core idea of the special theory of relativity. In 1916, Einstein further proposed his theory of gravity, called the general theory of relativity. Similarly, in this "strange" world, under the influence of massive objects (i.e., powerful gravitational fields), the space-time structure would bend and the flow of time would slow down. One-dimensional time could bend like three-dimensional space. In 1974, Frank J Tipler at Tulane University in the United States had calculated that if a cylinder of infinite length with a large mass rotated along its axis at close to the speed of light, it could allow astronauts to visit their own past. Similarly, this was also dragging the light around the axis, moving in a closed curve. In 1991, Princeton University's Richard Gurt predicted that cosmic strings (which Cosmologists believed formed in the early stages of the Big Bang) could cause similar results. The scientists discovered that when a spaceship passed through a gravitational field, the gravitational field's pull was converted into thrust. During that time, the spaceship could fly at light speed or even faster than light speed. NASA experts had created the Spacetime Field Resonance Theory, which was based on the unified field theory of Einstein and the German physicist Heisenberg. The gist of it was to use the elasticity of electromagnetism, gravity, light speed, and space-time to instantly cross time. Could superluminal time travel really be achieved? In 2001, a scientist discovered the superluminal transmission of light pulses in certain media. Later, people discovered that it was a visual effect. However, researchers believe that it is still possible for a single photon to exceed the speed of light. However, on July 24, 2011, a research team led by Du Shengwang, an associate professor of physics at the Hong Kong University of Science and Technology, confirmed that a single photon (the unit of light) complied with Einstein's theory that nothing could exceed the speed of light. Any superluminal travel was just a fantasy in some people's minds. Moreover, the cost of traveling at high speeds was also a problem. In order to accelerate a 10-ton load to 99.9% of the speed of light, 10 billion joules would be used, which was equivalent to the total energy production of the entire human race for several months. In addition, even if it could exceed the speed of light, the special theory of relativity also mentioned that the faster the object moved, the shorter the length, and the closer it was to the speed of light, the more obvious it was. This was the "Lorentz contraction" The general theory of relativity also mentioned that approaching the speed of light would be affected by the powerful tidal gravitational field. When it reached the speed of light, if it was a human, they would have already lost their human form, let alone superluminal speed.
Then, was the wormhole method feasible?
In Stephen? In Hawking's famous book, A Short History of Time, there was such a saying: " Perhaps the exit of the wormhole stops in the past, so you can travel backward in time through it.”
Shortly after the publication of the general theory of relativity, in 1935, Einstein theoretically discovered the existence of a wormhole, which was a "gap" in the space-time structure composed of two connected "black holes." It was a tunnel that ran through space and time. In other words, as long as one could build a stable wormhole, one could cross time and space. (According to Einstein's general theory of relativity, a large amount of matter or energy can distort the spacetime around it, or even be large enough to fold time, creating wormholes that pass through the present and the future.) Two Russian mathematical physicists believed that the atomic collision experiment conducted by the Large Hadron Collider could create a space-time rift.）Mathematicians called this a multiply connected space. But the theorist had never figured out that the wormhole only allowed light to pass through? Or could spaceships travel? In 1988, Sean and Morris of the California Institute of Technology finally came to a conclusion: Both ends of the wormhole could enter and exit, unlike the black hole, which was a one-way passage that could only enter but not exit. Moreover, the traveler would only experience a normal pulling force in the wormhole, unlike in the black hole. Also, the jeep from the University of California? Professor Kip Thorne also suggested,"It was not enough to just find such a "wormhole". He also had to make it open for a long time so that people would have enough time to enter it. According to quantum theory, this wormhole would close instantly under the effect of a strong force. One hypothesis was that quantum methods such as the Casimi effect could be used to inject antimatter into the wormhole, which could extend the opening time of the wormhole. In addition, he also used antimatter to "enlarge" it, drilling out a "time tunnel" that was about one light-year long. Such a 'time tunnel' was a shortcut from the present to the past. This required the integration of Einstein's general theory of relativity and quantum mechanics to create a new theory of quantum gravity. The model created by Thorne and his colleagues did not contradict the well-known physics theory, and this exploration led to a lot of research that continued to this day. The famous Los Alamos National Laboratory scientists had already developed ways to use wormholes. They had a deeper understanding of antimatter: For a long time, this strange antimatter only existed in theory. Now, they have successfully proved that antimatter also exists in our real world. He also concluded that the wormhole's powerful gravitational field could also be neutralized by antimatter. (According to scientists, antimatter also has a negative mass, which can absorb all the energy around it. Like wormholes, negative mass was once thought to only exist in theory. However, many laboratories in the world had successfully proved that "negative mass" could exist in the real world and captured traces of "negative mass" in space through spacecraft.）
To actually build a wormhole, there were three not-so-simple steps:
(1) Find or build a wormhole, open a tunnel to connect two different areas in space. Large wormholes may exist naturally in outer space, a remnant of the Big Bang. If that's not the case, then we'll have to make do with wormholes smaller than atoms, which are either natural products (small wormholes with a volume of 10 to the power of 33 centimeters are born and dying around us every second) or man-made products (produced by particle accelerator). These smaller wormholes would have to be expanded to a practical size, perhaps using the energy fields that caused space to expand shortly after the Big Bang.
(2) Stabilize the wormhole. By injecting negative energy produced by the quantum using the so-called Cosmi effect, the wormhole allowed signals and objects to safely pass through it. Negative energy would resist the wormhole's tendency to collapse to a point of infinite density or near infinity. In other words, it prevented the wormhole from evolving into a black hole.
(3) Pulling the wormhole. A spaceship with highly advanced technology separated the entrances of the wormhole from each other. If the two ports were placed in the right places in the space, the time difference would remain constant. If the difference was 10 years, an astronaut would jump to the future 10 years later if he went through the wormhole in one direction. Conversely, if he went through the wormhole in another direction, he would jump to the past 10 years ago. It sounded like science fiction, but it was a real research project that NASA was going to fund.
Therefore, at least for now, the wormhole method was the only possible choice for time travel.
Some authorities in the physics community even believed that wormholes in our world could exist naturally at the extremely small Planck length (about 10-33 cm). Although it was only 1/1020 the size of an atomic nucleus, in theory, such a small wormhole could be stabilized with only a beam of energy pulse, and then it could be expanded to a usable size. Therefore, if there was already a super civilization that could control it, it could even be built in a specific area on the surface of the earth. On the other hand, if the future civilization had a man-made time tunnel, then there must be an entrance to the time tunnel in outer space or even a specific area on the surface of the earth from ancient times to the future. In 1979, American and French scientists used instruments to discover a huge pyramid at the bottom of the sea near the Devil's Triangle (the specific location was 2000 feet below the sea 600 miles east of Miami, USA). Of course, this underwater pyramid was definitely not a product of nature. Charles, honorary curator of the Miami Museum in the United States? After hearing the news, Barritz sent someone to dive again with an underwater camera to take pictures. From the photo, we can see that this underwater pyramid is about twice as big as the largest pyramid in Egypt, the Great Pyramid of Giza. There were two huge black holes on the tower. The seawater passed through these two holes at high speed, causing the sea to be turbulent and misty. It was made of a special material (the density of the material was very similar to glass). The bottom of the tower was about 300 meters long and 200 meters high. In other words, the largest pyramid discovered by humans on Earth so far was located at the same 30 degrees north latitude of the Beirut Triangle. This was enough to make people suspect that there was an unexpected close connection between the Beirut Devil's Triangle and the Egyptian pyramid. The mysterious disappearance of some planes and ships in the Beirut Triangle area, as well as the frequent appearance of UFO and USO (UFO sightings from all over the world were recorded, and the occurrence rate in the Beirut Triangle area was shockingly high). In addition, so far, the large-scale investigation of the Beirut Triangle area had no results. It was not due to natural reasons such as geological phenomena, so it was reasonable to make this the biggest suspect at the entrance of the time tunnel. (Feng? Daniken believed that the seabed was an alien base, but there was no conclusive evidence to prove that these unknown moving objects must belong to aliens.）
At present, the academic community's judgment on the mystery of the Beirut Triangle was still far from the final conclusion. Some people tried to exaggerate it, while others completely rejected it. Based on my careful analysis of a large amount of relevant information, I hold a moderate attitude towards this.
The Devil's Triangle
In fact, there had been many space-time distortions here:
In 1954, in a hot air balloon race, Harry was the first to win. Logan and Derek? Norton's hot air balloon had mysteriously disappeared in Devil's Triangle. After multiple searches, there was still no trace of it. In the spring of 1990, during the hot air balloon race in cuba, the hot air balloon that had been missing for 36 years suddenly appeared in the place where it had disappeared. The Turks thought it was a secret weapon of the United States, so they sent a fighter jet to force it to land. Logan and Norton were sent to a secret naval base. They claimed that they were participating in the 1954 hot air balloon race in San Juan, Mexico. They had no idea that 36 years had passed and it was already 1990. They said that they felt a stabbing pain all over their bodies, as if a weak electric current had passed through their bodies, and then they felt a splitting pain that was unbearable. Everything around them, including the sky and the sea, turned red. The next thing they knew was that a fighter plane had followed their balloon and forced them to land. The expert on paranormal phenomena in the United States of Chicago, Kevin? Carowei and the others verified that the balloon was caught by the Triangle of Devils. To Logan and Norton, it was only a few seconds, but to Earth, it had been 36 years. (Mystery 1/95)
In 1955, a plane that went missing while flying over the Beirut Triangle returned to its original destination airport in 1990. The two pilots, who were presumed dead, also returned safely. Airport officials were surprised, but the pilots on the plane were puzzled by the onlookers. They thought it was 1955, because they had just crossed the Gulf of Mexico from Norfolk to Tampico, Mexico. The birth certificate of a pilot named Pablo showed that he was seventy-seven years old, but his face looked like he was in his early forties. His younger brother, Alfred, said,"I'm eager to see this man who claims to be my brother. I remember the tragedy very clearly. My brother sent me a letter from America, telling me that he and Mariano were preparing to fly home. This was the last time I heard from him. The plane never came back.”(Quest of Heaven and Earth 4/91)
On September 9, 1990, in the control tower of Caraga Airport in South America, a Douglas passenger plane that had long been eliminated was suddenly discovered flying to the airport, and the airport's radar could not find the plane at all. According to the telex, Flight 914 took off from New York on July 2, 1955, heading to California. It suddenly disappeared on the way and was never found. All 50 passengers on board had paid death insurance. The return of these people to their homes in the United States really surprised their families. The children and relatives were old, but they were still as young as they were back then. The American police and scientists specially checked the identity cards and bodies of these passengers and believed that this was not a farce, but a fact.
On January 6, 1966, the two-masted sailboat " Ulysses " mysteriously disappeared in the Beirut Triangle. Recently, it suddenly appeared on a deserted beach on the outskirts of Caracas, Argentina. There were three sailors on board. Mino, from Kanden, Maine, was a fisherman. He said that on January 6, 1966, the Ulysses departed from Aruba. Unexpectedly, it encountered a typhoon midway, so it hurriedly sailed to the nearby coast to avoid it. Who knew that when the local residents were asked, they told them that it was already 1990, and they were stunned. Another sailor, Polio, who was only 19 when the sailboat disappeared, recalled that when the typhoon hit, they were catching a big tuna weighing more than 250 pounds. As expected, the local residents found the frozen tuna in the cabin of the Ulysses. It was as fresh as if it had just been caught yesterday. The age and physical condition of the three sailors were no different from 24 years ago. The 42-year-old sailor should have been 66 years old, but he did not look old.
In 1970, an American 727 passenger plane with 127 passengers flew through the Beirut Triangle to Miami Airport. 20 minutes before landing, the plane suddenly disappeared from the radar screen. About 10 minutes later, it reappeared and landed safely at the airport. The crew was safe and sound, but the plane arrived at the airport ahead of time, and all the timers on the plane were 10 minutes slow. (UFO Exploration 5/92)
In August 1981, a British cruise ship went missing in the Beirut Triangle with six people on board. Unexpectedly, the cruise ship named Sea Breeze appeared in the original missing sea area in 1989, and the six people on board were safe and sound. However, these people had lost their sense of time. They were unaware that nearly eight years had passed. They thought that it was just a moment. The investigators repeatedly explained to them what time it was, and they gradually accepted this fact. When they were asked what had happened to them, they could not answer because they thought that they had not done anything "just now".
There was an obvious pattern in this. Four of the six cases above disappeared and reappeared in 1990. It seemed that the time at the exit of this space-time tunnel was set, which deepened the suspicion of the existence of artificial wormholes.
If the two ends of the wormhole were in the same place and separated by time rather than distance, in the distant past, the spacecraft could freely enter and exit on Earth or near it. Perhaps the dinosaurs would see the scene of the spaceship landing. However, the planet we live on is rotating around the sun at a speed of 30 kilometers per second. The sun carries us around the center of the Milky Way at a speed of 250 kilometers per second, traveling 7.9 billion kilometers per year. The Milky Way carries the solar system to the Hydra constellation at a speed of 600 kilometers per second, traveling 19 billion kilometers per year. This was another reason why many laymen doubted the feasibility of time travel: Since the Earth's position in space changed very quickly, if someone traveled through time and went to another time, would they not be able to reach the Earth's position in the past or future? For example, if someone went back to ancient times, wouldn't they have arrived at a location several light years away from Earth? (This statement is not accurate in the first place, because there is no absolute stationary frame of reference.) However, after reading the previous case of the mysterious disappearance of the Devil's Triangle in the Bernard Triangle for many years and reappearing near the original site, it can fully refute this suspicion: In fact, it was not impossible to make both ends of the wormhole in the same place and separate them by time and not distance!
In addition, there were scholars who believed that the wormhole time machine would be difficult to solve the problem of super radiation feedback. As long as a shield was installed at the entrance that could completely isolate radiation and allow people to pass through (it had to be 100%, or even a little bit would be magnified hundreds of millions of times).
In fact, the theory of relativity also provides us with another way to travel in the future, but it cannot be reversed. In 1916, Einstein proposed the "general theory of relativity," which expanded the special theory of relativity to include the various effects of gravity on time. Similarly, in this "strange" world, under the influence of massive objects (i.e., powerful gravitational fields), the space-time structure would bend and the flow of time would slow down. One-dimensional time could bend like three-dimensional space. The surprising conclusion of this theory is that gravity will slow down time, and we can also verify this. For example, Earth's gravity can slow down clocks by one microsecond every 300 years. In 1976, the physicist Robert McGonagall was born. Robert Vissot and Martin? Martin Levine launched a rocket carrying a clock into space. They observed that the clock gained 1/10 of a microsecond more than the same clock on Earth. In order to travel in the future, one only needed to use gravitational fields that were much stronger than Earth's gravity, such as the gravitational field of a neutron star. Neutron stars were celestial bodies that had shrunk to a small fraction of their original size due to the influence of their own mass after exhausting their own fuel, but their overall mass remained at a very high level. Some of these neutron stars were only slightly larger than a city on Earth, but their mass exceeded that of the sun. Their own strong gravity turned their atoms into a pile of neutrons, and this gravitational effect produced a time distortion that was much more obvious than the effect of Earth's gravity: Seven years on a neutron star is equivalent to ten years on Earth, so if we can get our spacecraft to a neutron star like this (like the one in the Cancer Nebula), we will take a big step forward in the future. But the problem is, how can we build a spaceship that can withstand the extremely harsh conditions near a neutron star? Moreover, under such circumstances, we are unable to return to the future.
If the technical difficulties were overcome, the production of time machines would open Pandora's box full of contradictions. There was still at least one more dilemma about time travel that no one had been able to solve. For example, if a person really "returned to the past" and killed his grandmother before his mother was pregnant with him, then the time traveler himself could not complete the murder because he could not be born. These contradictions put the concept of causality into a dilemma, and science based on the logical relationship between causality was also difficult to establish. For the "grandmother fallacy"(sometimes systematically explained by other family relationships), the most popular solution in the physics community was the "multiverse" theory. There was not only one world, but many parallel worlds. In 1957, the physicist Hugh Everrett proposed the "multi-world theory" based on quantum mechanics. He believed that the evolution of the universe from the Big Bang was like a fork in the road, splitting into two. The difference was caused by a quantum transfer caused by a key event, and the world that was separated would produce differences, becoming multiple "parallel worlds" or "equal dimensional universes." (So far, there are three types of theories: Quantum mechanics multi-universe system, general theory of relativity multi-universe system, turbine supercharged multi-universe system.）Moreover, in recent years, the physicist Stephen Hawking also pointed out: Countless universes were connected to each other through wormholes. You return to the past, but it's not your own world, but a universe of equal dimensions that has a similar history to yours. This way, even if you killed your grandmother, she would still be alive and well when you returned to the future. And time travel expert David? David Deitch used some laws of quantum physics to answer these contradictions. In the subatomic world, quantum uncertainty dominated: An electron colliding with a neutron could turn left or right, and there was no pattern to follow. In the view of some physicists, this uncertainty caused the universe to be multiple. Every time an electron turned to the right, it would form a new universe with an electron that turned to the left. In Deutch's opinion, the contradiction could be solved in the same way: If the time traveler interfered with history, the universe would split into two or more branches, and the mother who was killed would go to another parallel universe instead of entering the universe where the matricricidal belonged. People could go back to the past to interfere with history and change it. In fact, it was to create a new world and history. Stephen Hawking called it the "alternative historical hypothesis." However, if this was the case, then the large amount of evidence about time reversal could not be explained. Therefore, I believe that things can go back to the real history, as long as they don't 're-establish' a causality with the things in history that have a causality connection with them. On the contrary, they would enter the 'parallel universe'! In addition, there were still scientists who believed that it was impossible for a time machine to return to the time before it was created. Could he return to the real history? And the real history before the invention of the time machine? -- So far, no time travel expert had explored this aspect in depth.
In fact, the time reversal problem was a world-class problem in the history of human physics. For humans in the first half of the 21st century, where science and technology were still in the early stages of development, it was very difficult to completely explain all the questions brought about by " time reversal." Whoever could completely solve this kind of problem could win the Nobel Prize in Physics. However, just because humans couldn't solve the problem at the moment didn't mean that it could never be solved! Just because humans couldn't prove it didn't mean that it didn't exist! Modern human science and technology were developing at a rapid pace. He believed that there would be a day when it would happen!
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