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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

Does quantum gravity give rise to an observable nonlocality?
Speaker(s): Rafael Sorkin
Abstract: If spacetime is "quantized" (discrete), then any equation of motion compatible with the Lorentz transformations is necessarily non-local. I will present evidence that this sort of nonlocality survives on length scales much greater than Planckian, yielding for example a nonlocal effective wave-equation for a scalar field propagating on an underlying causal set. Nonlocality of our effective field theories may thus provide a characteristic signature of quantum gravity.
Date: 17/01/2007 - 2:00 pm
Series: Colloquium
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