arXiv subjects

Sujayita Bakra

Publications and source records attributed to Sujayita Bakra.

2 recordsLinked to original sources

arXiv2023

The canonical quantization of the cosmic fluid in the pre-inflationary era: a new kind of Emergent Universe

The early phase of cosmic evolution is still a great topic of interest to the cosmologist community. Especially the mechanism behind the origin of the Universe is yet to be resolved. Most people believe in the Big Bang models (singular origin of the Universe), but fewer of the cosmologists support in favor of the non-singular origin of the Universe in their works. These models are based on the standard general theory of relativity. In this work, we have aimed to investigate the nature of the early cosmic evolution from the canonical quantization of the cosmic fluid and importantly to find a probable answer of what the true origin of the Universe is.

gr-qc↗

arXiv2023

Is emergent scenario in the early Universe a consequence of the dynamics of real scalar field particle ?

Emergent scenario of cosmic evolution is a topic of great interest in recent cosmology, especially because it describes a non-singular origin of the Universe unlike the Big-Bang models. This types of cosmic evolution pattern have already been established through the non-equilibrium thermodynamic prescription. But those models are phenomenological and requires physical interpretation from the perspective of quantum field theory. This work is an effort to search a quantum field theoretical reason to justify the emergent nature of the Universe and the nature of cosmic evolution at the early phase of the cosmic expansion. Keywords : Non-singular evolution of the Universe, Quantum field theory, Cosmology.

gr-qc↗