44 citations · 143 across the 7 of their papers we have counts for
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gr-qc2004
Acceleration of the universe, vacuum metamorphosis, and the large-time asymptotic form of the heat kernel
Leonard Parker, Daniel A. T. Vanzella
We investigate the possibility that the late acceleration observed in the rate of expansion of the universe is due to vacuum quantum effects arising in curved spacetime. The theore…
gr-qc1999
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-qc1998
Testable Consequences of Curved-Spacetime Renormalization
Leonard Parker
I consider certain renormalization effects in curved spacetime quantum field theory. In the very early universe these effects resemble those of a cosmological constant, while in th…