Evidence for asymptotic safety from dimensional reduction in causal dynamical triangulations

A bstract We calculate the spectral dimension for a nonperturbative lattice approach to quantum gravity, known as causal dynamical triangulations (CDT), showing that the dimension of spacetime smoothly decreases from ∼ 4 on large distance scales to ∼ 3/2 on small distance scales. This novel result m...

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Veröffentlicht in:	The journal of high energy physics 2015-03, Vol.2015 (3), p.1, Article 151
Hauptverfasser:	Coumbe, D. N., Jurkiewicz, J.
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Sprache:	eng
Schlagworte:	Classical and Quantum Gravitation Elementary Particles High energy physics Physics Physics and Astronomy Quantum Field Theories Quantum Field Theory Quantum Physics Regular Article - Theoretical Physics Relativity Theory String Theory
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description	A bstract We calculate the spectral dimension for a nonperturbative lattice approach to quantum gravity, known as causal dynamical triangulations (CDT), showing that the dimension of spacetime smoothly decreases from ∼ 4 on large distance scales to ∼ 3/2 on small distance scales. This novel result may provide a possible resolution to a long-standing argument against the asymptotic safety scenario. A method for determining the relative lattice spacing within the physical phase of the CDT parameter space is also outlined, which might prove useful when studying renormalization group flow in models of lattice quantum gravity.
doi_str_mv	10.1007/JHEP03(2015)151
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subjects	Classical and Quantum Gravitation Elementary Particles High energy physics Physics Physics and Astronomy Quantum Field Theories Quantum Field Theory Quantum Physics Regular Article - Theoretical Physics Relativity Theory String Theory
title	Evidence for asymptotic safety from dimensional reduction in causal dynamical triangulations
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