Why time is irreversible or the hidden principle of time irreversibility in action

Despite all the achievements of physicists, there are still many undiscovered laws in nature, and one of them is the hidden principle of the irreversibility of time. According to him, the passage of time is inexorable and irreversible and, thus, no "time machine" can exist in principle.

Irreversibility of time or why a "time machine" cannot be created

Of course, the very possibility of going from the present to the past or the future has been stirring the minds of many people for quite some time. And after all, according to the theory of relativity, time is nothing more than just one of four dimensions, and, therefore, moving back in time should not be much more difficult than moving to the left instead of moving right.

But one has only to admit the thought that such displacements may well be real, as a multitude of logical paradoxes immediately arise.

So let's look at one of them, which can be roughly called the Grandfather Paradox. Let's say you have a time machine and you travel back in time to prevent your grandfather from meeting with your grandmother.

If you do not allow your grandfather to meet with your grandmother, then in the future you simply will not be able to appear. This means that you will not be able to travel into the past and thus upset the meeting of your grandparents.

This means that everything will go on as usual, and you will still be born and, thus, you will be able to go to the past, etc.

So the very opportunity to change something in the past tense provokes a whole complex of logical unsolvable dilemmas.

But only if we turn again to the theory of relativity, then according to its prediction, such movements in time are still possible near supermassive and superdense object, which should also rotate at a speed close to the speed of propagation of the light flux in vacuum.

Of course, at the moment and in the near foreseeable future, humanity simply does not have such technologies that will allow spinning an object close in mass to the mass of a black hole to transonic speed. So, humanity has no prospects of creating a time machine yet.

So it is precisely this paradoxical nature of the very possibility of moving in time, perhaps, that became the impetus for the fact that at one time the astrophysicist S. Hawking formulated his hypothesis that time is fundamentally irreversible.

And in order to prevent temporary paradoxes, there is a law in nature that prohibits moving from the present to the past. And the best argument in favor of the reliability of this theory is the fact that if time travel is possible, then where are the travelers themselves.

How many still undiscovered mechanisms and laws work in physics is unknown, which means that theoretical physicists still have a lot of work to do.

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