41 citations · 58 across the 5 of their papers we have counts for
5 papers
Scalar and vector tail radiation from the interior of the lightcone
Craig J. Copi, Klaountia Pasmatsiou, Glenn D. Starkman
In a generic spacetime a massless field propagates not just on the surface of the forward lightcone of a source, but in its interior. This inside-the-lightcone "tail radiation" is…
Finite-Size Effects On The Self-Force
Yi-Zen Chu, Klaountia Pasmatsiou, Glenn D. Starkman
Electromagnetic and linear gravitational radiation do not solely propagate on the null cone in 3+1 dimensions in curved spacetimes, contrary to their well-known behavior in flat sp…
Tunneling Between Schwarzschild-de Sitter Vacua
Klaountia Pasmatsiou
We extend the study of the effect of static primordial black holes on vacuum decay. In particular, we compare the tunneling rates between vacua of different values of the cosmologi…
Caustic Formation upon Shift Symmetry Breaking
Klaountia Pasmatsiou
We examine how the breaking of shift symmetry affects the formation of caustics for the standard canonical kinetic theory as well as for the DBI theory. We show in this case, that…
Kinematics of Einstein-Cartan universes
Klaountia Pasmatsiou, Christos G. Tsagas, John D. Barrow
We analyse the kinematics of cosmological spacetimes with nonzero torsion, in the framework of the classical Einstein-Cartan gravity. After a brief introduction to the basic featur…