PIRSA:04050000

Video URL

https://pirsa.org/04050000

Modifying Gravity in the Infra-Red by imposing an Ultra-Strong equivalence principle.

Piazza, F. (2009). Modifying Gravity in the Infra-Red by imposing an Ultra-Strong equivalence principle.. Perimeter Institute for Theoretical Physics. https://pirsa.org/04050000

Piazza, Federico. Modifying Gravity in the Infra-Red by imposing an Ultra-Strong equivalence principle.. Perimeter Institute for Theoretical Physics, May. 27, 2009, https://pirsa.org/04050000 

          @misc{ scivideos_PIRSA:04050000,
            doi = {10.48660/04050000},
            url = {https://pirsa.org/04050000},
            author = {Piazza, Federico},
            keywords = {Quantum Gravity, Quantum Fields and Strings, Particle Physics, Cosmology},
            language = {en},
            title = {Modifying Gravity in the Infra-Red by imposing an Ultra-Strong equivalence principle.},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2009},
            month = {may},
            note = {PIRSA:04050000 see, \url{https://scivideos.org/pirsa/04050000}}
          }

Federico Piazza Aix-Marseille University

Talk numberPIRSA:04050000
DOI10.48660/04050000
Source RepositoryPIRSA
Collection
Talk Type Conference
Subject

Abstract

I will give account of a work in progress in which I attempt to modify the metric-manifold structure of GR in the infra-red. The proposed modification does not contain any massive parameter as it is effective at length scales comparable with the inverse (extrinsic) curvature. The guiding line for this modification is an "ultra-strong" equivalence principle, according to which even semi-classical gravitational effects (i.e. particle production) are definitely banned from a sufficiently small free-falling elevator. Some cosmological consequences of this modification will be discussed.