| Name: | RASHMIKANTA MANTRY |
| Affiliation: | Manipal Centre for Natural Sciences, Centre of Excellence, Manipal Academy of Higher Education, Manipal |
| Conference ID : | ASI2024_711 |
| Title : | Solving the Hubble Tension by Fundamental Physics |
| Authors : | Rashmikanta Mantry*, Kazuyuki Furuuchi*, Suvedha Suresh Naik*
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| Authors Affiliation: | *Manipal Centre for Natural Sciences, Centre of Excellence, Manipal Academy of Higher Education, Dr. T.M.A. Pai Planetarium Building, Manipa, 57610l4, Karnataka, India
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| Mode of Presentation: | Poster |
| Abstract Category : | Galaxies and Cosmology |
| Abstract : | The Hubble tension refers to the disagreement between the value of the Hubble constant inferred from the observations of the early universe and those of the late universe. This discrepancy has been persistent, and the statistical significance has reached around 5 σ. The inference from the observations of the early universe assumes the concordance ΛCDM model of cosmology. Therefore, we may resolve the Hubble tension by modifying the underlying cosmological model. The modification should have a solid theoretical motivation. In this work, we explore modifications based on fundamental physics. To be more specific, we explore modifications suggested by the swampland program: the swampland program aims to identify general criteria that those effective field theories that can consistently couple to quantum gravity should satisfy. These hypothetical criteria are called swampland conjectures. Since we currently do not have a complete theory of quantum gravity, the swampland conjectures remain as conjectures. However, many plausible arguments for the swampland conjectures have been given, in particular, arguments based on string theory, the leading candidate for the unified theory including quantum gravity. We construct cosmological models motivated by the swampland conjectures and test them with the currently available cosmological observations. |
