Zobrazeno 1 - 10
of 202
pro vyhledávání: '"Carfora M"'
Autor:
Buchert, T., Carfora, M., Ellis, G. F. R., Kolb, E. W., MacCallum, M. A. H., Ostrowski, J. J., Räsänen, S., Roukema, B. F., Andersson, L., Coley, A. A., Wiltshire, D. L.
Publikováno v:
Class. Quantum Grav. 32 (2015) 215021
No. In a number of papers Green and Wald argue that the standard FLRW model approximates our Universe extremely well on all scales, except close to strong field astrophysical objects. In particular, they argue that the effect of inhomogeneities on av
Externí odkaz:
http://arxiv.org/abs/1505.07800
Publikováno v:
JHEP0612:017,2006
We exploit the properties of the three-dimensional hyperbolic space to discuss a simplicial setting for open/closed string duality based on (random) Regge triangulations decorated with null twistorial fields. We explicitly show that the twistorial N-
Externí odkaz:
http://arxiv.org/abs/hep-th/0607146
We review some of our recent work on the conformal geometry corresponding to the triangulated surfaces used in 2-dimensional simplicial quantum gravity. In particular, we discuss the regularized Liouville action associated with random Regge triangula
Externí odkaz:
http://arxiv.org/abs/gr-qc/0310039
Publikováno v:
J.Geom.Phys. 52 (2004) 137-173
By exploiting a correspondence between Random Regge triangulations (i.e., Regge triangulations with variable connectivity) and punctured Riemann surfaces, we propose a possible characterization of the SU(2) Wess-Zumino-Witten model on a triangulated
Externí odkaz:
http://arxiv.org/abs/hep-th/0209031
Publikováno v:
Class.Quant.Grav. 19 (2002) 5195-5220
We show that the introduction of triangulations with variable connectivity and fluctuating egde-lengths (Random Regge Triangulations) allows for a relatively simple and direct analyisis of the modular properties of 2 dimensional simplicial quantum gr
Externí odkaz:
http://arxiv.org/abs/gr-qc/0206077
Publikováno v:
Class.Quant.Grav. 19 (2002) 3761-3774
We introduce a quantum volume operator $K$ in three--dimensional Quantum Gravity by taking into account a symmetrical coupling scheme of three SU(2) angular momenta. The spectrum of $K$ is discrete and defines a complete set of eigenvectors which is
Externí odkaz:
http://arxiv.org/abs/gr-qc/0112043
Publikováno v:
Nucl.Phys.B619:690-708,2001
We consider the path-sum of Ponzano-Regge with additional boundary contributions in the context of the holographic principle of Quantum Gravity. We calculate an holographic projection in which the bulk partition function goes to a semi-classical limi
Externí odkaz:
http://arxiv.org/abs/hep-th/0107112
Publikováno v:
Nucl.Phys. B542 (1999) 349-394
This is an expanded and revised version of our geometrical analysis of the strong coupling phase of 4D simplicial quantum gravity. The main differences with respect to the former version is a full discussion of singular triangulations with singular v
Externí odkaz:
http://arxiv.org/abs/hep-lat/9806035
Publikováno v:
Lect.NotesPhys.50:197,1997
We discuss the geometry of dynamical triangulations associated with 3-dimensional and 4-dimensional simplicial quantum gravity. We provide analytical expressions for the canonical partition function in both cases, and study its large volume behavior.
Externí odkaz:
http://arxiv.org/abs/hep-th/9612069
Publikováno v:
J.Geom.Phys. 18 (1996) 247-294
We discuss the counting of minimal geodesic ball coverings of $n$-dimensional riemannian manifolds of bounded geometry, fixed Euler characteristic and Reidemeister torsion in a given representation of the fundamental group. This counting bears releva
Externí odkaz:
http://arxiv.org/abs/hep-th/9412097