Wednesday, July 10, 2013

1307.2270 (J. Ambjorn et al.)

Euclidian 4d quantum gravity with a non-trivial measure term    [PDF]

J. Ambjorn, L. Glaser, A. Goerlich, J. Jurkiewicz
We explore an extended coupling constant space of 4d regularized Euclidean quantum gravity, defined via the formalism of dynamical triangulations. We add a measure term which can also serve as a generalized higher curvature term and determine the phase diagram and the geometries dominating in the various regions. A first order phase transition line is observed, but no second order transition point is located. As a consequence we cannot attribute any continuum physics interpretation to the so-called crinkled phase of 4d dynamical triangulations.
View original:

No comments:

Post a Comment