Self-tuning Horava-Lifshitz's Universe

TL;DR

This paper proposes a modified Horava-Lifshitz gravity model that achieves self-tuning of the cosmological constant, effectively canceling its gravitational effect and allowing for accelerating universe scenarios with various fluids.

Contribution

It introduces a novel modification to Horava-Lifshitz gravity enabling self-tuning of the cosmological constant, removing its gravitational influence.

Findings

Cosmological constant's gravitational effect is canceled in the model.

Accelerating universe scenarios are achievable with different fluids.

The model provides a new approach to the cosmological constant problem.

Abstract

In this paper we show that by considering a slightly modified Horava-Lifshitz gravity one can find self-tuning cosmological scenarios. Since in the proposed model the cosmological constant cancels out, then regardless of its value it cannot produce any gravitational effect. As a consequence this removes the gravitational effect of the vacuum energy on the expansion of the Universe. Accelerating scenarios, however, can be found through the presence of conventional and non-conventional fluids.