The Big Bang: Origins and initial conditions from Self-Regulating Cosmology (SRC) model

Generating appropriate initial conditions for the Universe is key to discussing cosmic evolution constructively. In Standard Cosmology, the traditional approach assumes an early Universe that emerges from an infinite density, spacetime singularity. This early Universe then undergoes inflationary expansion, followed by a matter-creating “reheat” period. The approach produces results generally in good agreement with observations. However, to date, it is not known how (or even whether) a real past-directed spacetime-singularity can generate a regular spacetime that becomes the observed Universe. It has previously been suggested that appropriate initial conditions should emerge naturally from existing physics rather than be set a priori. In this work we seek to generate initial conditions predicated on the Self-Regulating Cosmology (SRC) model recently presented [M. R. Mbonye, Int. J. Mod. Phys. D 32 (2023) 2350076]. In SRC, cosmic dynamics leads to a universe that also self-regenerates from one evolutionary cosmic phase (or kalpa) to another. Within each such kalpa the dynamics evolves between two disparate scales of horizons. The end of a kalpa and the beginning of the next interface through a phase transition. The interface of the two phases sets up the initial conditions of the emerging phase. These conditions involve: a natural time-reset, nonsingular spatial scale, energy and entropy. The issue of whether (or not) the early Universe undergoes inflation becomes naturally self-manifest in this treatment. In the context of the SRC model, we discuss the Initial Entropy Problem (IEP). Lastly, we highlight current observations of over-mature (galaxy and blackhole) structures at high redshifts, by James Webb Space Telescope (JWST).