2014/11/30 by Robert Blaga · 7 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Classical mechanics #Cosmology and Gravitation Theories #De Sitter space #De Sitter universe #Galaxies: Formation, Evolution, Phenomena #Inertial frame of reference #Mathematical physics #Minkowski space #Physics #Quantum electrodynamics #Quantum mechanics #Scalar (mathematics) #Scalar field #Universe #hep-th
paper · pdf · doi:10.1142/s0217732315500625
published in Modern Physics Letters A 30(11), 1550062 (World Scientific)
arxiv created 2015/01/28 · openalex publication_date 2015/03/25 · arxiv updated 2015/03/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate the radiation of an inertial scalar particle evolving in a de Sitter (dS) expanding Universe. In the context of scalar QED, the process is generated by the first-order term in the perturbation theory expansion of the S-matrix. The partial transition probability is obtained and analyzed, and soft-photon emission is found to dominate overall. It has been argued that an inertial particle evolving in dS spacetime loses physical momentum just as a decelerated particle in Minkowski space does. It is thus expected that an inertial charge will radiate in a similar way. We investigate the radiated energy and make a qualitative comparison of the angular distribution of the energy with the radiation pattern in the latter case.