Speaker
Syed Moeez Hassan
(University of New Brunswick)
Description
The cosmological constant problem is described as one of the greatest crises of modern physics. The conventional problem is posed in the framework of quantum fields on a fixed background and their semiclassical backreaction on gravity. In this talk, expanding on a recent proposal, I will argue that this problem does not arise in a fully non-perturbative gravity-matter framework. I will show how vacuum energy density depends on a choice of global time and physical Hamiltonian, and how it varies from one choice to another.
Author
Syed Moeez Hassan
(University of New Brunswick)
