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2014

Theory and Phenomenology of Spacetime Defects

Hossenfelder, Sabine

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Whether or not space-time is fundamentally discrete is of central importance for the development of the theory of quantum gravity.

If the fundamental description of space-time is discrete, typically represented in terms of a graph or network, then the apparent smoothness of geometry on large scales should be imperfect -- it should have defects.
Here, we review a model for space-time defects and summarize the constraints on the prevalence of these defects that can be derived from observation.

Theory and Phenomenology of Spacetime Defects · Around

Built on

R. Loll, “Discrete approaches to quantum gravity in four-dimensions,”
1998
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F. Dowker, J. Henson and R. D. Sorkin, “Quantum gravity phenomenology, Lorentz invariance and discreteness,”
2004
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F. Markopoulou and L. Smolin, “Disordered locality in loop quantum gravity states,”
2007
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T. Konopka, F. Markopoulou and S. Severini, “Quantum Graphity: A Model of emergent locality,”
Original
2008
Earlier work this paper cites.
L. Bombelli, J. Henson and R. D. Sorkin, “Discreteness without symmetry breaking: A theorem,”
2009
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Then

G. Amelino-Camelia, “Quantum Gravity Phenomenology,”
Original
2013
Later among the works it cites.
S. Hossenfelder, “Phenomenology of Space-time Imperfection I: Nonlocal Defects,”
Original
2013
Later among the works it cites.
S. Hossenfelder, “Phenomenology of Space-time Imperfection II: Local Defects,”
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2013
Later among the works it cites.
S. Hossenfelder, “Minimal Length Scale Scenarios for Quantum Gravity,”
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2013
Later among the works it cites.

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M. Schreck, F. Sorba and S. Thambyahpillai, “A simple model of pointlike spacetime defects and implications for photon propagation,”

Cited in the paper.

F. Caravelli and F. Markopoulou, “Disordered locality and Lorentz dispersion relations: an explicit model of quantum foam,”

Cited in the paper.