$CPT$ Violating Electrodynamics and Chern-Simons Modified Gravity

Mingzhe Li, Yi-Fu Cai, Xiulian Wang +1

The electrodynamics with a Chern-Simons term $p_{\mu }{A}_{\nu }{\tilde{F}}^{\mu \nu }$ violates Lorentz and $CPT$ symmetries with a non-vanishing $p_{\mu }$. For a fixed vector $p_{\mu }$, in this paper we…