30 citations · 119 across the 8 of their papers we have counts for
8 papers
Reheating in the kination epoch via multi-channel decay of gravitationally created massive scalars
Juho Lankinen, Oskari Kerppo, Iiro Vilja
We provide a detailed study of reheating in the kination regime in a scenario where the particle content is produced by gravitational production of massive scalars decaying into ma…
Reheating via gravitational particle production in kination epoch
Juho Lankinen, Oskari Kerppo, Iiro Vilja
We provide a detailed study of reheating in the kination regime where particle content is created by gravitational production of massive scalars mutually interacting with a massles…
Fermionic decay of a massive scalar in the early Universe
Juho Lankinen, Joonas Malmi, Iiro Vilja
We derive a curved space generalization of a scalar to fermion decay rate with a Yukawa coupling in expanding Friedmann-Robertson-Walker universes. This is done using the full theo…
Particle decay in expanding Friedmann-Robertson-Walker universes
Juho Lankinen, Iiro Vilja
The lack of energy conservation introduces new particle processes in curved spacetime that are forbidden in flat space. Therefore one has to be very cautious about using the result…
Decaying Massive Particle in Matter and Radiation Dominated Eras
Juho Lankinen, Iiro Vilja
According to the standard model of cosmology, the early universe has been dominated by radiation or non-relativistic matter in several eras of its history. However, many cosmologic…
Decay of a Massive Particle in a Stiff Matter Dominated Universe
Juho Lankinen, Iiro Vilja
In the presence of a gravitational field decay rates may significantly differ from flat space equivalent. By studying mutually interacting quantum fields the decay rates can be cal…
Gravitational Particle Creation in a Stiff Matter Dominated Universe
Juho Lankinen, Iiro Vilja
A scenario for gravitational particle creation in a stiff matter dominated flat Friedmann-Robertson-Walker universe is presented. The primary creation of scalar particles is calcul…
Complete positivity, finite temperature effects, and additivity of noise for time-local qubit dynamics
Juho Lankinen, Henri Lyyra, Boris Sokolov +3
We present a general model of qubit dynamics which entails pure dephasing and dissipative time-local master equations. This allows us to describe the combined effect of thermalisat…