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Spectral dimension of the universe

By J. Ambjørn, J. Jurkiewicz and R. Loll


We measure the spectral dimension of universes emerging from nonperturbative\ud quantum gravity, defined through state sums of causal triangulated geometries.\ud While four-dimensional on large scales, the quantum universe appears two-di-\ud mensional at short distances. We conclude that quantum gravity may be “self-\ud renormalizing” at the Planck scale, by virtue of a mechanism of dynamical dimen-\ud sional reduction

Topics: Natuur- en Sterrenkunde
Publisher: American Physical Society
Year: 2005
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