Gravitation of finite range and the accelerated expansion of the   universe
  In an earlier work we showed that the gravitational interaction could be reproduced as a retarded dispersion interaction (Casimir interaction) between particles composed of hypothetical particles having harmonic oscillator interactions. Here we derive the modification of the force when the vacuum modes have a small but finite temperature. The resulting interaction is of finite range. We give the result on analytical form. 
Bo E. Sernelius