3 papers
gr-qc2019
Post inflationary evolution of inflation-produced, large-scale magnetic fields using a generalised cosmological Ohm's law and both standard and modified Maxwell's equations
Timothy Oreta, Bob Osano
In most of the literature on evolution of cosmological magnetic fields, it is found that large-scale magnetic fields evolve as (adiabatic magnetic decay) wher…
gr-qc2019
A transient phase in cosmological evolution : A multi-fluid approximation for a quasi-thermodynamics equilibrium
Bob Osano, Timothy Oreta
This article presents the study of a multi-species fluid characterised by a freeze-out or break-away of one or more species. Whereas single-fluid approximation suffices for modelli…
gr-qc2018
Multi-fluid Theory and Cosmology: A Convective Variational Approach to Interacting Dark-Sector
Bob Osano, Timothy Oreta
This article examines the foundation of the recently developed relativistic variational formalism[1]. Our work is heavily based on [2, 27] which extends this approach to the multi-…