Ghost Condensate Busting

TL;DR

This paper develops ghost condensation models using the Thomas-Fermi approximation, creating stable theories that avoid instabilities linked to null-energy condition violations.

Contribution

It introduces a novel approach to constructing ghost condensation models that are free from common instabilities, advancing theoretical understanding.

Findings

Stable ghost condensation models achieved

Models avoid null-energy condition instabilities

Theoretical framework established for further research

Abstract

Applying the Thomas-Fermi approximation to renormalizable field theories, we construct ghost condensation models that are free of the instabilities associated with violations of the null-energy condition.