I Is the CPT-Symmetric Universe Theory the Key to Solving the Antimatter Mystery?

[Quarker]

https://arxiv.org/abs/1803.08928.

This is a simple and elegant theory, but there are some things I don’t understand. Why would the anti-universe exist before the Big Bang? From the viewpoint of the anti-universe, isn’t our universe time-reversed?

Also, unless the total charge of all particles of the two universes is zero, this doesn’t solve the antimatter issue. For the charges to balance out, the two universes would have to be identical; for every particle in one universe, there would have to be an anti-particle in the other. Neil Turok has said that quantum uncertainty would lead to different universes.

If the two universes are identical, except for being mirror images of one another, do they interact in some way? Electromagnetism seems the likeliest candidate for that. An electromagnetic null wave making the jump to a time-reversed universe seems possible in such a theory, although detecting it might prove difficult.

The main attraction of this theory for me is the symmetry, and the non-zero possibility that such symmetry arises from the aesthetic choices of a creator. But as always, the evidence comes first.

 

[kimbyd]

Matter and anti-matter are linked by the CPT symmetry, the T of which stands for time. That is, the arrow of time* is reversed for anti-matter compared to normal matter. So from the point of origin, normal matter goes forward in time, while anti-matter goes backwards in time.

* Note: the quantum arrow of time doesn't actually have to be the same as the macroscopic one we observe. I believe this paper is proposing that they are the same.