Non-equilibrium electromagnetic fluctuations: Heat transfer and interactions

Matthias Krüger 1, Thorsten Emig 2, Mehran Kardar 1

Physical Review Letters 106 (2011) 210404

The Casimir force between arbitrary objects in equilibrium is related to scattering from individual bodies. We extend this approach to heat transfer and Casimir forces in non-equilibrium cases where each body, and the environment, is at a different temperature. The formalism tracks the radiation from each body and its scatterings by the other objects. We discuss the radiation from a cylinder, emphasizing its polarized nature, and obtain the heat transfer between a sphere and a plate, demonstrating the validity of proximity transfer approximation at close separations and arbitrary temperatures.

  • 1. Department of Physics,
    Massachusetts Institute of Technology
  • 2. Laboratoire de Physique Théorique et Modèles Statistiques (LPTMS),
    CNRS : UMR8626 – Université Paris XI - Paris Sud