Fluctuation-Electromagnetic Interaction between Rotating Nanoparticles.   2.Relativistic Theory
  We study the fluctuation electromagnetic interaction in a system of two rotating electrically neutral nonmagnetic particles with allowance for relativistic retardation effect. The particles are assumed to have different temperatures being embedded into a heated vacuum background (photon gas). Closed expressions for the free energy, frictional torque and the rate of heat transfer are derived and compared to the known static results and those in the electrostatic limit without retardation. 
A.A. Kyasov and G. V. Dedkov
cond-mat.mes-hall quant-ph