Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Early Universe Cosmology in The Light of Hubble Tension

Version 1 : Received: 18 July 2023 / Approved: 18 July 2023 / Online: 19 July 2023 (07:18:00 CEST)

How to cite: Kumar, D. Early Universe Cosmology in The Light of Hubble Tension. Preprints 2023, 2023071304. Kumar, D. Early Universe Cosmology in The Light of Hubble Tension. Preprints 2023, 2023071304.


Our comprehension of fundamental cosmological principles hinges on a thorough understanding of the early universe. The Lambda Cold Dark Matter (ΛCDM) model has emerged as a valuable framework for elucidating various cosmic phenomena, uniting a cosmological constant (Λ) with cold dark matter (CDM). Nevertheless, recent observations, particularly data from the Planck, WMAP, and DES missions that probe the early universe, alongside local measurements of the Hubble constant, have unveiled significant inconsistencies. These inconsistencies have magnified the perplexing issue known as the Hubble Tension, thereby challenging our current understanding of the universe. To address this conundrum, we adopt a comprehensive approach encompassing a review of cosmological fundamentals, an exploration of the ΛCDM model, an examination of the cosmic microwave background (CMB), power spectrum, and perturbation theory, a thorough review of existing research, and finally, an investigation of real data. By undertaking these early universe processes, we aim to understand more about Hubble constant and its consequence in ΛCDM model.


Early Universe; Cosmic Microwave Background; Power Spectrum; Anisotropy; Scalar Fileds; Data Analysis


Physical Sciences, Astronomy and Astrophysics

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