Colloquium〝A new theory of the universe〞

Observations of the universe have revealed a surprising economy in its basic laws and structure. In this light, Latham Boyle and the speaker have reconsidered cosmology’s central puzzles, aiming to find simpler, more principled and more predictive solutions. From an improved understanding of the big bang singularity, they were able to explain the dark matter as consisting of a stable, massive Right-Handed(RH) neutrino. Forthcoming large scale galaxy surveys including EUCLID and Large Synoptic Survey Telescope(LSST) will closely test this hypothesis. The baryon asymmetry can likewise accounted for by the standard model including RH neutrinos (leptogenesis). By calculating the gravitational entropy for realistic cosmologies, they have found a new explanation for the large scale geometry of the cosmos which does not require inflation. These thermodynamic arguments address the arrow of time and provide a clue to the role of the cosmological constant. They recently found a new cure for the leading order divergences of the standard model coupled to gravity, requiring no new particles or forces and explaining why there are three generations of standard model fermions (including RH neutrinos). As a byproduct of this change in the properties in the quantum vacuum of the standard model, they show how approximately scale-invariant, primordial curvature perturbations, responsible for the formation of galaxies and large scale structure, are generated. The perturbation amplitude, statistical properties and character are predicted in terms of standard model parameters. If time allows, the speaker will discuss a new and potentially observable signature on very large scales.

時間:2022.12.08(四) 22:00~23:20
頻道:(網上講授)Zoom ID:942-338-0685 ← gravity
講者:Neil Turok(University of Edinburgh)



“Copernicus Webinar and Colloquium Series”: To promote scientific discussions during this pandemic, they are organizing an online seminar series, i.e. Copernicus Webinar Series, seeking the most outstanding speakers to introduce innovative ideas and important progress in the field of gravity and cosmology. This series is named after the famous Polish Astronomer, Nicolaus Copernicus, whose discovery eventually marked the dawn of modern science.



Verified by MonsterInsights