197 citations · 1.4k across the 36 of their papers we have counts for
Showing 1999Show all
3 papers · 1 filter
gr-qc1999★ 1 cited
Vacuum-driven Metamorphosis
Leonard Parker, Alpan Raval
We show that nonperturbative vacuum effects can produce a vacuum-driven transition from a matter-dominated universe to one in which the effective equation of state is that of radia…
gr-qc1999★ 45 cited
Vacuum effects of ultra-low mass particle account for Recent Acceleration of Universe
Leonard Parker, Alpan Raval
In recent work, we showed that non-perturbative vacuum effects of a very low mass particle could induce, at a redshift of order 1, a transition from a matter-dominated to an accele…
gr-qc1999★ 171 cited
Non-perturbative effects of vacuum energy on the recent expansion of the universe
Leonard Parker, Alpan Raval
We show that the vacuum energy of a free quantized field of very low mass can significantly alter the recent expansion of the universe. The effective action of the theory is obtain…