Lorentz-violating gravitoelectromagnetism

TL;DR

This paper explores the analogy between electromagnetism and gravity within the Lorentz-violating Standard-Model Extension, revealing how Lorentz violation can induce gravitomagnetic effects even for static sources.

Contribution

It develops a novel connection between Lorentz-violating electromagnetic and gravitational sectors, providing methods to derive gravitational metrics from electromagnetic solutions.

Findings

Lorentz violation leads to gravitomagnetic fields from static sources

Post-Newtonian metrics can be obtained from electromagnetic solutions

Unconventional effects in Lorentz-violating electrostatics and magnetostatics

Abstract

The well-known analogy between a special limit of General Relativity and electromagnetism is explored in the context of the Lorentz-violating Standard-Model Extension (SME). An analogy is developed for the minimal SME that connects a limit of the CPT-even component of the electromagnetic sector to the gravitational sector. We show that components of the post-newtonian metric can be directly obtained from solutions to the electromagnetic sector. The method is illustrated with specific examples including static and rotating sources. Some unconventional effects that arise for Lorentz-violating electrostatics and magnetostatics have an analog in Lorentz-violating post-newtonian gravity. In particular, we show that even for static sources, gravitomagnetic fields arise in the presence of Lorentz violation.