Light speed variation from active galactic nuclei

Hao Li, Bo-Qiang Ma

Recent studies on the high-energy photons from gamma-ray bursts~(GRBs) suggested a light speed variation $v(E)=c(1-E/E_{\mathrm{LV}})$ with $E_{\mathrm{LV}}=3.6\times 10^{17}$ GeV. W…