An alternative idea about the source of baryon asymmetry in the Universe

TL;DR

The paper presents a novel scenario for baryon asymmetry origin based on lattice gravity and phase transitions at ultra-high temperatures, involving fermion state splitting and minimal charge asymmetry preservation.

Contribution

It introduces an alternative baryogenesis mechanism involving phase transitions and fermion state splitting in a lattice gravity framework.

Findings

Proposes a phase transition at GUT temperatures leading to space-time asymmetry.

Describes fermion state splitting into two non-interacting states after the transition.

Suggests the resulting baryon asymmetry is extremely small and preserved over time.

Abstract

The paper proposes an alternative scenario for the emergence of baryon asymmetry in the Universe. This scenario is realized in the lattice gravity model associated with the Dirac field as follows. At ultra-high temperatures of the Grand Unification order $T_c\sim10^{18}$ GeV and higher, the system is in a PT-symmetric phase. But when the temperature decreases, a phase transition to an asymmetric phase occurs, in which a non-zero tetrad appears, that is, space-time with the Minkowski metric, and the system's wave function splits into two: $|\rangle=|+\rangle+|-\rangle$. The fields of tetrads in states $|+\rangle$ and $|-\rangle$ differ in sign. At the very first moment of time with a duration of the order of the Planck time, a transition of fermions between these states is possible. These transitions in different parts of space are not correlated with each other. Therefore, the final asymmetry of the fermion charge between these states is relatively extremely small and it is preserved in time, since the interaction of the states $|+\rangle$ and $|-\rangle$ ceases at times greater than the Planck time.