0 A note on Weyl transformations in two - dimensional dilaton gravity ∗
نویسنده
چکیده
We discuss Weyl (conformal) transformations in two-dimensional matterless dilaton gravity. We argue that both classical and quantum dilaton gravity theories are invariant under Weyl transformations. PACS number(s): 04.60.Kz, 04.20.Cv
منابع مشابه
Conformal Equivalence of 2d Dilaton Gravity Models
We investigate the behavior of generic, matter-coupled, 2D dilaton gravity theories under dilaton-dependent Weyl rescalings of the metric. We show that physical observables associated with 2D black holes, such as the mass, the temperature and the flux of Hawking radiation are invariant under the action of both Weyl transformations and dilaton reparametrizations. The field theoretical and geomet...
متن کامل6 v 1 1 N ov 1 99 8 OUTP - 98 - 71 P NBI - HE - 98 - 32 hep - th / 9811006 November 1998 Induced Dilaton in Topologically Massive Quantum Field
We consider the conformally-invariant coupling of topologically massive gravity to a dynamical massless scalar field theory on a three-manifold with boundary. We show that, in the phase of spontaneously broken Lorentz and Weyl symmetries, this theory induces the target space zero mode of the vertex operator for the string dilaton field on the boundary of the three-dimensional manifold. By a fur...
متن کاملDimensional Reduction of 4d Heterotic String Black Holes
We perform the spherical symmetric dimensional reduction 4d → 2d of heterotic string theory. We find a class of two-dimensional (2d) dilaton gravity models that gives a general description of the near-horizon, near-extremal behavior of four-dimensional (4d) heterotic string black holes. We show that the duality group of the 4d theory is realized in two dimensions in terms of Weyl transformation...
متن کاملInfnca-th9904 Dimensional Reduction of 4d Heterotic String Black Holes
We perform the spherical symmetric dimensional reduction 4d → 2d of heterotic string theory. We find a class of two-dimensional (2d) dilaton gravity models that gives a general description of the near-horizon, near-extremal behavior of four-dimensional (4d) heterotic string black holes. We show that the duality group of the 4d theory is realized in two dimensions in terms of Weyl transformation...
متن کاملWeyl Invariance and Spurious Black Hole in Two-dimensional Dilaton Gravity
In two-dimensional dilaton gravity theories, there may exist a global Weyl invariance which makes black hole spurious. If the global invariance and the local Weyl invariance of the matter coupling are intact at the quantum level, there is no Hawking radiation. We explicitly verify the absence of anomalies in these symmetries for the model proposed by Callan, Giddings, Harvey and Strominger. The...
متن کامل