Applications of the theory of self-adjoint extensions in Quantum Gravity
The functional renormalization group in quantum field theory in curved spacetimes
Quest for low-energy traces of quantum-gravity (and relativistic quantum information)
| Full text | |
| Author(s): |
Total Authors: 2
|
| Affiliation: | [1] Fed Univ ABC, Ctr Math, Santo Andre - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | EUROPEAN PHYSICAL JOURNAL C; v. 79, n. 6 MAY 28 2019. |
| Web of Science Citations: | 1 |
| Abstract | |
We show that quantum gravity yields exponentially growing gravitational waves. Without a mechanism to stop these modes from growing, the universe would go through a gravitational collapse. For Minkowski background, we propose a solution by choosing an integration contour in Fourier space that does not enclose the problematic modes, thus preventing them from showing up in the effective theory. It turns out that this is only possible when the modes are removed altogether. For an expanding universe, we argue that the runaway modes can be managed accordingly to the dynamics of the Hubble constant, leading to important implications for astrophysics. (AU) | |
| FAPESP's process: | 17/18897-8 - Fluid/gravity correspondence, fermionic sectors and its ramifications |
| Grantee: | Roldão da Rocha |
| Support Opportunities: | Regular Research Grants |