Particle creation from vacuum by Lorentz violation

Abstract

It is shown that the vacuum state in presence of Lorentz violation can be followed by a particlefull universe that represents the current status of the universe. In this model the modification in dispersion relation (Lorentz violation) is picked up representing the regime of quantum gravity. The result can be interpreted such that the existence of the particles is an evidence for quantum effects of gravity in the past. It is concluded that only the vacuum state is sufficient to appear the matter fields spontaneously after the process of semi-classical analysis.PACS: 04.60.-m (Quantum gravity), 04.62.+v (Quantum fields in curved spacetime)

Parameter estimation for a Lorentz invariance violation

“…As examples of such models we can mention the Double Special Relativity Theory [18][19][20][21], the Extra-Dimensional Theories [22], the Horava-Lifshitz Theory [24][25][26] and the Theories with Non-Commutative Geometries [26][27][28]. Another path pursued in recent research is the possibility of particle creation as well as entropy generation due to Lorentz invariance violation in the course of cosmological evolution [29][30][31]. In this viewpoint, the existence of particles and the entropy production can be interpreted as an evidence for quantum gravity effects in the early universe.…”