Spontaneous emission of a two-level static atom coupling with the   electromagnetic vacuum fluctuations outside a high-dimensional Einstein   Gauss-Bonnet black hole
  In present paper, by using the generalized DDC formalism, we investigate the spontaneous excitation of an static atom interacting with electromagnetic vacuum fluctuations outside a EGB black hole in $d$-dimensions. We find that spontaneous excitation does not occur in Boulware vacuum. The Gauss-Bonnet term has no effect on the stability of the atom. Finally, we discuss the contribution of the coupling constant and dimensional factor to the results in three different kinds of spacetime. 
Ming Zhang, Zhan-Ying Yang, Rui-Hong Yue
hep-th