M. Brisudova et Wh. Kinney, Back reaction of a long range force on a Friedmann-Robertson-Walker background - art. no. 103516, PHYS REV D, 6210(10), 2000, pp. 3516
It is possible that there may exist long-range forces in addition to gravit
y. In this paper we construct a simple model for such a force based on exch
ange of a massless scalar field and analyze its effect on the evolution of
a homogeneous Friedmann-Robertson-Walker cosmology. The presence of such an
interaction leads to an equation of state characterized by positive pressu
re and to resonant particle production similar to that observed in preheati
ng scenarios.