Talk by Professor Samir D. Mathur, Department of Physics,Ohio State University, USA at QASTM seminar
Channel: Sayantan Choudhury
Date: 29/07/2021

Title: A new approach to quantum cosmology

Abstract: We first discuss the fundamental puzzles posed by cosmology. We then note that the black hole information paradox gives a new picture of the gravitational vacuum. Instead of just having quantum gravity fluctuations at the planck scale, we have virtual fluctuations of black hole states with all radii upto the scale of the cosmological horizon. The natural suppression of fluctuations to large black hole states is offset by the large degeneracy of such states. These fluctuations, called vecros, provide an extra source of energy when the expansion power law undergoes a change. Thus the dynamics of vecros may provide the energy needed to drive inflation, account for the cosmological constant today, and provide the Early Dark Energy (EDE) needed to resolve the tension between the Hubble constant values obtained from early and late time observations.

Speaker: Professor Samir D. Mathur, Department of Physics, Ohio State University, Ohio, USA.

Date and Time: 29th July 2021, 6.30 PM to 9.00 PM India time (3:00 PM to 5.30 PM Berlin time).

Zoominar link: https://mpi-aei.zoom.us/j/97623339163

Contact: Dr. Sayantan Choudhury (sayantan.choudhury@niser.ac.in)