Health checkup test of the standard cosmological model"
Recently, intriguing tensions and anomalies are severely questioning the correctness of the standard Lambda Cold Dark Matter (ΛCDM) model of cosmology, motivating both the need to double check its underlying assumptions and the opportunity to probe new physics with increasing precision. In this talk I will discuss both possibilities in light of the most recent observations of the cosmic microwave background temperature and polarization anisotropies.
Davide Maria Lombardo: “UV-Constraints on IR-EFTs "
GGI Tea Breaks is a new web-seminars series on the Theory of Fundamental Interactions, covering a wide spectrum of arguments.
The aim is to discuss the open questions in Fundamental physics while offering to researches and pH.D. students a simple introduction to some of the hottest topics in the field.
Speaker:
Leonardo Rastelli (Yang Institute, Stony Brook)
Title:
Pulling yourself up by your bootstraps in quantum gravity
Abstract
The bootstrap program leverages symmetry and mathematical consistency to study strongly coupled quantum systems. Its flagship result has been the solution of the 3D critical Ising model from abstract principles alone. In this talk I will outline how universal properties of quantum gravity can also be studied from a bootstrap perspective. A surprising discovery has been a connection between black hole thermodynamics and the sphere packing problem, a venerable question in pure mathematics.
GGI Tea Breaks' Seminar - Johanna Erdmenger (University of Würzburg)
GGI Tea Brekas is a new web-seminars series on the Theory of Fundamental Interactions, covering a wide spectrum of arguments.
The aimis to discuss th eopen questions in Fundamental physics while offering to researches and pH.D. students a simple intrudaction to some of the hottest topics in the field.
Marc Kamionkowski (Johns Hopkins University)
Title:
"Is the ΛCDM model in trouble?"
BIO
Marc Kamionkowski is a theoretical physicist. His research is in cosmology, astrophysics, and elementary-particle theory. His main focus has been on particle dark matter, inflation and the cosmic microwave background, and cosmic acceleration. He also worked on neutrino and nuclear physics and astrophysics, large-scale-structure and galaxy formation, intrinsic galaxy alignments and gravitational lensing, gravitational waves, phase transitions in the early Universe, alternative-gravity theories, the first stars and the epoch of reionization, and a bit in stellar and high-energy astrophysics.
ABSTRACT
We’ve known since the late 1920s that the Universe is expanding. However, the expansion rate currently inferred from measurements of the cosmic microwave background now disagrees with that obtained from supernova measurements. Over the past few years, theorists have been exploring the possibility that this Hubble tension is explained by some new “early dark energy”: a new component of matter that may have been dynamically important several hundred thousand years after the Big Bang.
All the information and materials about the seminars are available on the