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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

Is the cosmological constant a nonlocal quantum residue of discreteness of the causal set type?
Speaker(s): Rafael Sorkin
Abstract: The currently accelerating Hubble expansion is in accord with the old heuristic prediction, from causal set theory, of a fluctuating and ever-present cosmological "constant''. More recently, a phenomenological model based on certain of the ideas behind the prediction has been devised, but it remains incomplete. I will review these developments and also mention a possible consequence for the dimensionality of spacetime.
Date: 27/05/2009 - 11:00 am
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