Evolution of the equation of state parameters of cosmological tachyonic   field components through mutual interaction
  We study the perturbed equation of state (EOS) parameters of the cosmological tachyonic scalar field components and their mutual time-dependent interaction.   It is shown that the discrete temperature-dependent pattern of the EOS emerges from an initial continuum along the evolution of the universe. This leads to two major components in form of dark energy and dark matter, and also suggests a solution to the cosmological constant problem and the coincidence problem. 
Murli Manohar Verma and Shankar Dayal Pathak
astro-ph.CO