Speaker
Prof.
Aleksandr Kamenshchik
(Università di Bologna)
Description
We consider a procedure of elimination of cosmological singularities similar to that suggested in the recent paper by Simpson and Visser for the construction of regular black holes. It is shown that by imposing a non-singular cosmological evolution with a bounce in a flat Friedmann universe filled with a minimally coupled scalar field, we obtain a transition between the standard scalar field and its phantom counterpart. The potential of the scalar field has in this case a non-analyticity of the cusp type. This result is readily reproduced also in the case of an anisotropic Bianchi I universe. We obtain also a new regular black hole solution sustained by a scalar field.
Faculty position
Full Professor
| Topic Field | Cosmology |
|---|
Primary author
Prof.
Aleksandr Kamenshchik
(Università di Bologna)
Co-authors
Dr
Leonardo Chataignier
(Università di Bologna)
Dr
Alessandro Tronconi
(Università di Bologna)
Prof.
Giovanni Venturi
(Università di Bologna)
