Zobrazeno 1 - 10
of 675
pro vyhledávání: '"RIEDLER, J."'
Publikováno v:
Phys.Rev. D59 (1999) 124018
We consider two versions of quantum Regge calculus. The Standard Regge Calculus where the quadratic link lengths of the simplicial manifold vary continuously and the Z_2-Regge Model where they are restricted to two possible values. The goal is to det
Externí odkaz:
http://arxiv.org/abs/hep-lat/9903028
Publikováno v:
Nucl.Phys.Proc.Suppl. 73 (1999) 789-791
An approximation of the Standard Regge Calculus (SRC) was proposed by the $Z_2$-Regge Model ($Z_2$RM). There the edge lengths of the simplicial complexes are restricted to only two possible values, both always compatible with the triangle inequalitie
Externí odkaz:
http://arxiv.org/abs/hep-lat/9809135
Publikováno v:
Frontiers in Quantum Physics (Springer 1998) pp. 303
Standard Regge Calculus provides an interesting method to explore quantum gravity in a non-perturbative fashion but turns out to be a CPU-time demanding enterprise. One therefore seeks for suitable approximations which retain most of its universal fe
Externí odkaz:
http://arxiv.org/abs/hep-lat/9807041
Autor:
Berg, B., Riedler, J.
Publikováno v:
Comput.Phys.Commun. 107 (1997) 39-48
This paper deals with a situation of some importance for the analysis of experimental data via Neural Network (NN) or similar devices: Let $N$ data be given, such that $N=N_s+N_b$, where $N_s$ is the number of signals, $N_b$ the number of background
Externí odkaz:
http://arxiv.org/abs/hep-ex/9703001
Publikováno v:
Nucl.Phys.Proc.Suppl. 53 (1997) 735-738
We compare different models of a quantum theory of four-dimensional lattice gravity based on Regge's original proposal. From Monte Carlo simulations we calculate two-point functions between geometrical quantities and estimate the masses of the corres
Externí odkaz:
http://arxiv.org/abs/hep-lat/9608055
Publikováno v:
Phys.Rev.D54:7421-7425,1996
We analyze Regge quantum gravity coupled to SU(2) gauge theory on $4^3\times 2$, $6^{3}\times 4$ and $8^{3}\times 4$ simplicial lattices. It turns out that the window of the well-defined phase of the gravity sector where geometrical expectation value
Externí odkaz:
http://arxiv.org/abs/hep-lat/9605036
Publikováno v:
Nucl.Phys.Proc.Suppl. 47 (1996) 625-628
We examine the phase structure of pure Regge gravity in four dimensions and compare our Monte Carlo results with $Z_2$-link Regge-theory as well as with another formulation of lattice gravity derived from group theoretical considerations. Within all
Externí odkaz:
http://arxiv.org/abs/hep-lat/9510021
Publikováno v:
Phys.Lett. B348 (1995) 355-359
We present potentials between static charges from simulations of quantum gravity coupled to an SU(2) gauge field on $6^{3}\times 4$ and $8^{3}\times 4$ simplicial lattices. The action consists of the gravitational term given by Regge's discrete versi
Externí odkaz:
http://arxiv.org/abs/hep-lat/9502006
Publikováno v:
Nucl.Phys.Proc.Suppl. 42 (1995) 710-712
A new method for nonperturbative investigations of quantum gravity is presented in which the simplicial path integral is approximated by the partition function of a spin system. This facilitates analytical and numerical computations considerably. In
Externí odkaz:
http://arxiv.org/abs/hep-lat/9412073
Publikováno v:
Nucl.Phys.Proc.Suppl. 42 (1995) 707-709
We present investigations of the potential between static charges from a simulation of quantum gravity coupled to an SU(2) gauge field on $6^{3}\times 4$ and $8^{3}\times 4$ simplicial lattices. In the well-defined phase of the gravity sector where g
Externí odkaz:
http://arxiv.org/abs/hep-lat/9412037