155 citations · 3.6k across the 84 of their papers we have counts for
6 papers · 1 filter
Steep Eternal Inflation and the Swampland
Konstantinos Dimopoulos
I investigate whether eternal inflation is possible when the inflaton originally travels upslope the scalar potential and inevitably reaches a turn-around point where its classical…
Is the Big Rip unreachable?
Konstantinos Dimopoulos
I investigate the repercussions of particle production when the Universe is dominated by a hypothetical phantom substance. I show that backreaction due to particle production preve…
Dark energy as a remnant of inflation and electroweak symmetry breaking
Konstantinos Dimopoulos, Tommi Markkanen
It is shown that dark energy can be obtained from the interplay of the Higgs boson and the inflaton. A key element is the realization that electroweak symmetry breaking can trigger…
Primordial Black Hole Formation During Slow Reheating After Inflation
Bernard Carr, Konstantinos Dimopoulos, Charlotte Owen +1
We study the formation of primordial black holes (PBHs) in the early Universe during a period of slow reheating after inflation. We demonstrate how the PBH formation mechanism may…
Non-minimal gravitational reheating during kination
Konstantinos Dimopoulos, Tommi Markkanen
A new mechanism is presented which can reheat the Universe in non-oscillatory models of inflation, where the inflation period is followed by a period dominated by the kinetic densi…
Instant Preheating in Quintessential Inflation with -Attractors
Konstantinos Dimopoulos, Leonora Donaldson Wood, Charlotte Owen
We investigate a compelling model of quintessential inflation in the context of -attractors, which naturally result in a scalar potential featuring two flat regions, the inflati…