Vector field mediated models of dynamical light velocity

TL;DR

This paper analyzes a vector-tensor gravity theory that predicts different speeds for gravitational and matter waves, leading to superluminal inflation that addresses early universe initial value problems.

Contribution

It introduces a detailed analysis of a vector-tensor gravity model with multiple light cones, providing a novel mechanism for superluminal inflation in cosmology.

Findings

Different speeds of gravitational and matter waves are predicted.

Superluminal inflation can resolve initial value problems.

The theory's light cone structure leads to acausal effects.

Abstract

A vector-tensor theory of gravity that was introduced in an earlier publication is analyzed in detail and its consequences for early universe cosmology are examined. The multiple light cone structure of the theory generates different speeds of gravitational and matter wave fronts, and the contraction of these light cones produces acausal, superluminary inflation that can resolve the initial value problems of cosmology.