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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

PIRSA:10090067  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Gravity in (and with) Quantum Spacetime
Abstract: Over the last decade there has been strong interest in the theory and phenomenology of particle propagation in quantum spacetime. The main results concern possible Planck-scale modifications of the "dispersion" relation between energy and momentum of a particle. I review results establishing that these modifications can be tested using observations of gamma rays from sources at cosmological distances. And I report recent progress in the understanding of the implications of spacetime expansion for such studies. I also discuss recent preliminary results suggesting that the same Planck-scale modifications of the dispersion relation might have an unexpected role in gravitational collapse.
Date: 30/09/2010 - 1:00 pm
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