Quantum Ho\v{r}ava-Lifshitz cosmology and the quantum nature of coupling corrections of HL gravity

TL;DR

This paper explores quantum cosmology within Hořava-Lifshitz gravity, analyzing wave functions near singularities, quantum effects on coupling constants, and the evolution of entanglement entropy using Wheeler-DeWitt and Bohm-De Broglie interpretations.

Contribution

It provides a quantum analysis of FRW cosmology in Hořava-Lifshitz gravity, revealing the quantum nature of coupling corrections and their impact on singularity avoidance.

Findings

Existence of cosmological wave functions related to coupling constants

Quantum effects may prevent classical singularities

Explicit evolution of entanglement entropy in the ultraviolet phase

Abstract

In this work were studied quantum models of a Friedmann-Robertson-Walker (FRW) cosmology in the framework of the gravity's theory proposed by Ho\v{r}ava, the so-called Ho\v{r}ava-Lifshitz theory of the gravity. It was used the Ho\v{r}ava theory for the projectable Ho\v{r}ava-Lifshitz (HL) gravity without the detailed balance condition. Following the quantization of the model in the context of Wheeler-DeWitt approach and taking in account the ordering factor for operators were found the cosmological wave function. Solutions were studied and the results were discussed for some particular cases close of initial singularity. The resulting wave functions were used to investigate the possibility of to avoid the classical singularities due to quantum effects and for analyzing the entanglement entropy. In the ultraviolet phase were found the existence of cosmological wave function with a relation between the ordering factor and coupling constants showing their quantum nature, then it was possible to provide an explicit evolution of the cosmological entanglement entropy in this stage. The interpretation of Bohm-De Broglie was used to discussion of the solutions.