Zobrazeno 1 - 10
of 232
pro vyhledávání: '"Liebl, H."'
Publikováno v:
Nucl.Phys. B544 (1999) 403-431
General 2d dilaton theories, containing spherically symmetric gravity and hence the Schwarzschild black hole as a special case, are quantized by an exact path integral of their geometric (Cartan-) variables. Matter, represented by minimally coupled m
Externí odkaz:
http://arxiv.org/abs/hep-th/9809168
Publikováno v:
Phys. Rev. D 58, 108501 (1998)
The trace anomaly for nonminimally coupled scalars in spherically reduced gravity obtained by Bousso and Hawking (hep-th/9705236) is incorrect. We explain the reasons for the deviations from our correct (published) result which is supported by severa
Externí odkaz:
http://arxiv.org/abs/hep-th/9801122
We demonstrate that in the absence of `matter' fields to all orders of perturbation theory and for all 2D dilaton theories the quantum effective action coincides with the classical one. This resolves the apparent contradiction between the well establ
Externí odkaz:
http://arxiv.org/abs/gr-qc/9710033
All 1+1 dimensional dipheomorphism-invariant models can be viewed in a unified manner. This includes also general dilaton theories and especially spherically symmetric gravity (SSG) and Witten's dilatonic black hole (DBH). A common feature --- also i
Externí odkaz:
http://arxiv.org/abs/gr-qc/9709010
Publikováno v:
Nucl.Phys. B513 (1998) 723-734
Performing an nonperturbative path integral for the geometric part of a large class of 2d theories without kinetic term for the dilaton field, the quantum effects from scalar matter fields are treated as a perturbation. When integrated out to two-loo
Externí odkaz:
http://arxiv.org/abs/hep-th/9707115
Publikováno v:
Mod.Phys.Lett. A12 (1997) 2683-2690
It is well known that spherically symmetric reduction of General Relativity (SSG) leads to non-minimally coupled scalar matter. We generalize (and correct) recent results to Hawking radiation for a class of dilaton models which share with the Schwarz
Externí odkaz:
http://arxiv.org/abs/hep-th/9707041
Publikováno v:
Nucl.Phys. B493 (1997) 491-502
Local path integral quantization of generic 2D dilaton gravity is considered. Locality means that we assume asymptotic fall off conditions for all fields. We demonstrate that in the absence of `matter' fields to all orders of perturbation theory and
Externí odkaz:
http://arxiv.org/abs/gr-qc/9612012
Publikováno v:
Class.Quant.Grav. 14 (1997) 889-904
A generalized dilaton action is considered of which the standard dilaton black hole and spherically reduced gravity are particular cases. The Arnowitt-Deser-Misner (ADM) and the Bondi-Sachs (BS) mass are calculated. Special attention is paid to both
Externí odkaz:
http://arxiv.org/abs/gr-qc/9605044
Publikováno v:
Nucl.Phys. B486 (1997) 353-370
The black hole of the widely used ordinary 2d--dilaton model (DBH) deviates from the Schwarzschild black hole (SBH) of General Relativity in one important feature: Whereas non-null extremals or geodesics show the expected incompleteness this turns ou
Externí odkaz:
http://arxiv.org/abs/gr-qc/9602040
Publikováno v:
Phys.Rev.D53:5609-5618,1996
Two dimensional gravity with torsion is proved to be equivalent to special types of generalized 2d dilaton gravity. E.g. in one version, the dilaton field is shown to be expressible by the extra scalar curvature, constructed for an independent Lorent
Externí odkaz:
http://arxiv.org/abs/gr-qc/9511009