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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

Modifying Gravity in the Infra-Red by imposing an Ultra-Strong equivalence principle.
Speaker(s): Frederico Piazza
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.
Date: 27/05/2009 - 3:45 pm
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