Dark energy from cosmological fluids obeying a Shan-Chen nonideal equation of state
Dark energy from cosmological fluids obeying a Shan-Chen nonideal equation of state
We consider a Friedmann-Robertson-Walker universe with a fluid source obeying a nonideal equation of state with ``asymptotic freedom,'' namely ideal gas behavior (pressure changes directly proportional to density changes) both at low and high density regimes, following a fluid dynamical model due to Shan and Chen. It is shown that, …