Giant Radiative Interactions Among Distant Atoms
  We examine the feasibility of enhancing the fundamental radiative interactions between distant atoms. We present general arguments for producing enhancement. In particular, we show how giant dipole-dipole interaction can be produced by considering dipoles placed close to micron sized silica spheres. The giant interaction arises as the whispering gallery modes can resonantly couple the dipoles. 
G. S. Agarwal (Physical Research Laboratory, Ahmedabad, India) and S.   Dutta Gupta (University of Hyderabad, Hyderabad, India)