One of the topics of many years of debate is the assumption of the possibility of travel in space and time. This is a tempting and beautiful theory about the ability to change your past, look into the future, find out what you did wrong in the past and correct again … look into the future again, find out the mistake of the past …
A strong psychological basis for the dream of almost every person is the opportunity to return to the past of his life and correct something there for the better. Of course, it is a sin not to take advantage of the opportunities and not to look into the future - to find out how the descendants settled there, what they have achieved and whether this world has not been thoroughly destroyed.
It is difficult to say how serious the assumption of building a functioning time machine can be. Currently, there is not even a hypothetical technology how the mechanism of a time machine can be arranged. And except for science fiction writers, no one else knows how the distortion of the structure of space will occur.
Time paradoxes
At the same time, the time machine generated by science fiction writers - but not yet born by science - has already generated a lot of hypotheses about temporal paradoxes, including in the scientific community.
About one of the popular and subsequently filmed hypothesis was told by the writer Ray Bradbury, promulgating the theory of a squashed butterfly in the past, and how it ends for the whole world to the present.
However, it is not a fact that events can develop according to the variant predicted by Bradbury. Let's say the Universe can be represented as a certain system of equations, which already includes the possibility of travel in space and time.
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Also, relying on this, it is not difficult to conclude another thing - a crushed butterfly will remain only a crushed butterfly and nothing more.
And even though after a hundred millennia carry it on the sole of a shoe, it will not break the chain of entropy, and in no way destroy the processes of the universe. Since the probability of this is already incorporated at the level of error in the equation of events, while traveling in time through several measurement systems.
Science does not deny the possibility of time travel, nevertheless, I am sure that if you can still get into the future, then you cannot move into the past, this is unscientific. However, there are many options for the development of time paradoxes, of course, except for a time traveler, no one will say which one is true.
Traveling to the past is impossible, so paradoxes are not worth a shell from an egg, Professor Stephen Hawking says about the impossibility of such a journey.
If time travel into the past is possible, it is a journey into alternatively evolving realities. And then, this is the structure of the Universe already known to us, where no solutions of probabilities cause paradoxes - that is, actions performed by someone in the past will not cause any disturbances in reality, and accordingly the probability of a paradox will be zero.
Protecting the Universe from the Fool
No matter what efforts a traveler makes in the past, in order to change his present reality of his time, everything will be meaningless. It is likely that the distortion of reality around the object plunged into the past will still occur. But reality, distorted by the presence of the traveler and his actions, will be distorted only in the surrounding "cloud" of time.
For example: by accidentally leading to the death of your grandfather in the past (run over by a car, or killed because of the grandmother in a duel) nothing will happen to the descendants of the deceased, and they will not disappear. Since the change will occur locally, in the very cloud of entropy created around the traveler, which is a kind of protection of the Universe from the "fool".
The mock of the universe is not your grandfather
If the example with a butterfly and a grandfather, although banal, is sufficiently indicative of how a local field (cloud) of entropy can work around a time traveler in the past, and thereby respond to the tasks of changing future reality created by him - then this is not all.
For example, how the protection mechanism will work if: a traveler from the future to the past, performs a simple action, opens a deposit on behalf of his grandfather for his grandson - the cunning man himself has not yet been born, so you have to persuade grandfather. Nevertheless, which way the situation will develop:
- The past is unchanged and the contribution will never exist.
- Or will it be a mockery of the universe? To solve your problems with it, the grandfather will suddenly turn out to be someone else's grandfather, and the contribution will go into other hands.
Perhaps, the most correct thought that reflects the attitude to the problem of a time machine as a device is that such an apparatus is not even worth it to generate temporary paradoxes because of it.
And moreover, from the point of view of entropy and the Universe, in order not to create problems of interference in fate, it would be best not to allow the existence of a time machine at all.