Antigravity from a spacetime defect

TL;DR

This paper proposes the existence of spacetime defects with negative gravitational mass in Minkowski space, which could produce repulsive gravitational effects akin to antigravity.

Contribution

It introduces the concept of spacetime defects with negative active gravitational mass, a novel idea in the context of Minkowski spacetime.

Findings

Spacetime defects can have negative active gravitational mass.

Such defects can repel test particles, demonstrating antigravity effects.

Theoretical framework for negative mass defects in flat spacetime.

Abstract

We argue that there may exist spacetime defects embedded in Minkowski spacetime, which have negative active gravitational mass. One such spacetime defect then repels a test particle, corresponding to what may be called "antigravity."