TY - JOUR
T1 - The semiclassical limit of causal dynamical triangulations
AU - Ambjørn, Jan
AU - Gorlich, A.
AU - Jurkiewicz, J.
AU - Gizbert-Studnicki, J.
AU - Trzesniewski, T.
PY - 2011/8/1
Y1 - 2011/8/1
N2 - Previous work has shown that the macroscopic structure of the theory of quantum gravity defined by causal dynamical triangulations (CDT) is compatible with that of a de Sitter universe. After emphasizing the strictly nonperturbative nature of this semiclassical limit we present a detailed study of the three-volume data, which allows us to re-confirm the de Sitter structure, exhibit short-distance discretization effects, and make a first detailed investigation of the presence of higher-order curvature terms in the effective action for the scale factor. Technically, we make use of a novel way of fixing the total four-volume in the simulations.
AB - Previous work has shown that the macroscopic structure of the theory of quantum gravity defined by causal dynamical triangulations (CDT) is compatible with that of a de Sitter universe. After emphasizing the strictly nonperturbative nature of this semiclassical limit we present a detailed study of the three-volume data, which allows us to re-confirm the de Sitter structure, exhibit short-distance discretization effects, and make a first detailed investigation of the presence of higher-order curvature terms in the effective action for the scale factor. Technically, we make use of a novel way of fixing the total four-volume in the simulations.
U2 - 10.1016/j.nuclphysb.2011.03.019
DO - 10.1016/j.nuclphysb.2011.03.019
M3 - Journal article
SN - 0550-3213
VL - 849
SP - 144
EP - 165
JO - Nuclear Physics, Section B
JF - Nuclear Physics, Section B
IS - 1
ER -