منابع مشابه
Vortices and black holes in dilatonic gravity
The extrapolation of the black hole ‘no-hair’ conjecture, initially proposed by Ruffini and Wheeler [1] and stating that a stationary black hole is uniquely determined by its mass, electromagnetic charge and angular momentum, to the stronger statement of ‘no dressing’ of the horizon, has been proven to be false [2], [3]. A common feature of such ‘counterexamples’ is that they involve nontrivial...
متن کاملCosmic strings in axionic-dilatonic gravity
We first consider local cosmic strings in dilaton-axion gravity and show that they are singular solutions. Then we take a supermassive Higgs limit and present expressions for the fields at far distances from the core by applying a Pecci-Quinn and a duality transformation to the dilatonic Melvin’s magnetic universe. PACS numbers: 04.70.-b, 11.27.+d
متن کاملDilatonic gravity near two dimensions as a string theory
Using the renormalization-group formalism, a sigma model of a special type —in which the metric and the dilaton depend explicitly on one of the string coordinates only— is investigated near two dimensions. It is seen that dilatonic gravity coupled to N scalar fields can be expressed in this form, using a string parametrization, and that it possesses the usual UV fixed point. However, in this st...
متن کاملQuantum dilatonic gravity in d = 2 , 4 and 5 dimensions
We review (mainly) quantum effects in the theories where gravity sector is described by metric and dilaton. The one-loop effective action for dilatonic gravity in two and four dimensions is evaluated. Renormalization group equations are constructed. The conformal anomaly and induced effective action for 2d and 4d dilaton coupled theories are found. It is applied to study of quantum aspects of b...
متن کاملDilatonic black holes in higher curvature string gravity.
P. Kanti, 1 N. E. Mavromatos, 2 J. Rizos, 3 K. Tamvakis, 3,* and E. Winstanley 2 Division of Theoretical Physics, Physics Department, University of Ioannina, Ioannina GR-451 10, Greece Department of Physics (Theoretical Physics), University of Oxford, 1 Keble Road, Oxford OX1 3NP, United Kingdom European Organization for Nuclear Research (CERN), Theory Division, 1211 Geneva 23, Switzerland ~Rec...
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ژورنال
عنوان ژورنال: Modern Physics Letters A
سال: 2000
ISSN: 0217-7323,1793-6632
DOI: 10.1142/s0217732300002553