When will there be a time machine? What is a Time Machine?

Let's look forward to it!

From ancient times to the present, time travel has always been people's dream. We want to go back in time to save a love or prevent a tragedy; We look forward to moving into the future and beyond the finite life. American physicist Rodman Mallett spent his life researching theories related to time in order to go back in time and save his father's life.

He believed he had mastered the secret to changing time and space, and that he could build a "time machine" for only £120,000.

The laser beam forms a "time tunnel".

According to reports, Mallett, 62, is a professor of physics at the University of Connecticut in the United States. His time machine is based on Einstein's general theory of relativity.

The theory of general relativity states that gravity is a curve of time and space, i.e. a strong gravitational field that can warp light and slow down the passage of time.

Mallett's conception is not at all like the sleigh in the British sci-fi artist H.G. Wells' "Time Machine", or the time machine in the movie "Back to the Future". Instead, his shuttle will look like a cylindrical swirl of light more than a meter in diameter, but it is actually a huge gravitational field created by a series of laser beam rings, the center of which is strong enough to distort space-time. Therefore, if a particle is placed in the middle of the halo, the particle will be pulled by the gravitational field.

As close as you get to the gravitational field, both the clock and the biological clock slow down. If one walks into this "time tunnel", one may appear at some point in the past.

One-way limited "time travel".

Mallett believes that he will see the world's first "time machine" appear in his lifetime. He hopes to get £120,000 ($250,000) to build a prototype machine in the lab. However, Mallett also has strict requirements for funders.

We want non-military funding**, and I don't want this to end up becoming"Highly confidential", so that we can't follow up on ourselves. ”

However, this envisioned "time machine" is not as described in science fiction**, which can go back and forth freely and reach a certain point in time as you like, but at most can only go back to the point when the machine was first started. Let's say you start the machine on January 1st and let it run for 3 months, then you enter the "time machine" in March and can only go back to January 1st at most. Therefore, it is impossible to go back to the Middle Ages or travel to ancient Rome, and it is impossible to reach the world of the future.

Summary. Therefore, even if the person living in the future disappears, he has not been able to create a time machine that travels back to the past, and naturally there is no record of people from the future.

For your question, should a time machine exist? The specific answer after inquiry is as follows: does not exist.

One of the reasons why it cannot be made is that humans, the earth, the sun, and even the galaxy have a limited amount of time to exist. Even if humans can immigrate to other planets, there will still be a day when Keiho will disappear sooner or later. Some cosmological theories say that at a certain time, the entire universe will fall silent.

Therefore, perhaps even at the moment when the manuscript disappears, the people who live in the future have not been able to create a time machine that travels back to the past, and naturally Jianchen has not left any record of people from the future.