Our universe may have a twin in which time passes backwards

The new theory suggests that next to our universe there is an “anti-universe” where time flows in the opposite direction. Researchers describe this theory in an article on the Web arXiv.

If confirmed, it would explain many of the mysteries of the universe. For example, dark matter, which we use to interpret inconsistencies between observed and calculated values ​​in space.

And we could also delete the theory of space inflation – its rapid expansion after the Big Bang, which we explain today ‘s high homogeneity of the universe.

Symmetrical twins

In nature, we know three basic symmetries: Charge (C, if you switch the charges of all the particles to the opposite charge, they will affect each other in the same way); parity (P if you look at a mirror image of this phenomenon, you get the same result) a time (T, if you return the action in time, it looks the same). Together it is called CPT symmetry.

Physical interactions are mostly governed by these symmetries. We have never seen them all broken at the same time.

In space, we apply CPT symmetry to the action of force and field. Theory of astrologers Lathama Boylea, Kierana Finnand Neil Turok, however, extends it to the entire “cosmic stage,” to the entire physical universe.

Scientists warn that we live in an expanding universe that is full of particles and evolves over time. If we extend the concept of CPT symmetry to it, then our view of the universe cannot provide the whole picture. In order to maintain symmetry throughout the universe, there must be a mirror universe that balances our own.

But this universe should have opposite charges than ours, it should be mirror-inverted and third — it should run against the flow of time. It would actually be the twin of our universe. Together, these twins would be symmetrical.

What would be the consequences?

First, according to the CPT’s symmetry, the universe would naturally expand and fill with particles, without having to explain this period of rapid expansion, that is, inflation of the universe.

Second, symmetrical twins would add another neutrino to our universe – very strange particles for which matter is transparent like glass to light and which pass through our bodies and the globe. And that, in turn, would explain the existence of dark matter.

But how to verify this theory? The anti-universe is somewhere behind the Big Bang, before the beginning of our universe, which dates to 13.7 billion years ago. We can’t get there.

However, one day we could test the theory of space twins by convincingly measuring the mass of neutrinos. Indirectly, it could also prove that we could no longer find the gravitational waves that, according to the theoretical model, flooded the universe when it was shaken by inflation.

True, the three-scientists’ theory of the space twins looks wild. However, more than a hundred years ago, Einstein’s theories of relativity also looked wild…

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