Thermodynamics of Kerr-Newman-AdS black holes and conformal field theories
- M. Caldarelli, G. Cognola, D. Klemm
- Physics
- 3 August 1999
We study the thermodynamics of four-dimensional Kerr-Newman-AdS black holes both in the canonical and the grand-canonical ensemble. The stability conditions are investigated, and the complete phase…
One-loop f(R) gravity in de Sitter universe
- G. Cognola, E. Elizalde, S. Nojiri, S. Odintsov, S. Zerbini
- Physics
- 13 January 2005
Motivated by the dark energy issue, the one-loop quantization approach for a family of relativistic cosmological theories is discussed in some detail. Specifically, general f(R) gravity at the…
Casimir energies for spherically symmetric cavities
- G. Cognola, E. Elizalde, K. Kirsten
- Physics
- 29 June 1999
A general calculation of Casimir energies - in an arbitrary number of dimensions - for massless quantized fields in spherically symmetric cavities is carried out. All the most common situations,…
Dark energy in modified Gauss-Bonnet gravity: Late-time acceleration and the hierarchy problem
- G. Cognola, E. Elizalde, S. Nojiri, S. Odintsov, S. Zerbini
- Physics
- 31 December 2005
Dark energy cosmology is considered in a modified Gauss-Bonnet (GB) model of gravity where an arbitrary function of the GB invariant, f(G), is added to the general relativity action. We show that a…
Class of viable modified f(R) gravities describing inflation and the onset of accelerated expansion
- G. Cognola, E. Elizalde, S. Nojiri, S. Odintsov, L. Sebastiani, S. Zerbini
- Physics
- 24 December 2007
A general approach to viable modified f(R) gravity is developed in both the Jordan and the Einstein frames. A class of exponential, realistic modified gravities is introduced and investigated with…
String-inspired Gauss-Bonnet gravity reconstructed from the universe expansion history and yielding the transition from matter dominance to dark energy
- G. Cognola, E. Elizalde, S. Nojiri, S. Odintsov, S. Zerbini
- Physics
- 17 November 2006
We consider scalar-Gauss-Bonnet and modified Gauss-Bonnet gravities and reconstruct these theories from the universe expansion history. In particular, we are able to construct versions of those…
Quantum fields and extended objects in space-times with constant curvature spatial section
- A. Bytsenko, G. Cognola, L. Vanzo, S. Zerbini
- Physics
- 10 May 1995
Analytic Aspects of Quantum Fields
- A. Bytsenko, G. Cognola, Valter Moretti, S. Zerbini, E. Elizalde
- Mathematics
- 17 October 2003
Survey of Path Integral Quantization and Regularization Techniques Zeta-Function Regularization Method Generalized Quadratic Spectra and Spectral Functions on Non-Commutative Spaces Spectral…
Einstein gravity with Gauss-Bonnet entropic corrections
- G. Cognola, R. Myrzakulov, L. Sebastiani, S. Zerbini
- Physics
- 6 April 2013
A toy model of Einstein gravity with a Gauss-Bonnet classically "entropic" term mimicking a quantum correction is considered. The static black hole solution due to Tomozawa is found and generalized…
Classical non‐Abelian gauge theories in the space of reference frames
- G. Cognola, R. Soldati, L. Vanzo, S. Zerbini
- Mathematics
- 1 December 1979
Classical non‐Abelian gauge theories in presence of gravitation are reformulated in the language of the space of local reference frames. The geometric structure of this space, the transformation…
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