Contact
Name
Antonio De Felice
Position
Former member
Postdoc in CP3 from October 2007 to October 2009
Current position: Associate Professor at Yukawa Institute for Theoretical Physics, Kyoto.
My personal homepage
Past projects
Hide past projects.

I am involved in the following research direction:

Extra-dimensions

It is possible to construct classical models of extra-dimensions based on Field Theory and General Relativity. The goal is to gain deeper understanding into these systems based on tractable and well known theories. In particular, the so-called Randall-Sundrum (RS) models in various dimensions can be modelised as hyper-dimensional topological defects. Our present studies concern the realisation of the Dvali-Gabadadze-Porrati mechanism inside hyper-dimensional monopoles, in which four-dimensional gravity can be obtained by trapping gravitons.

External collaborators: Antonio De Felice (The University of Tokyo, Japan).

Modifications of gravity

The recent acceleration of the universe is explained in the standard model by the presence of a non-vanishing cosmological constant. However, one may also question the validity of General Relativity on length scales that have never been so accurately tested so far. However, it is not trivial to modify gravity and to build at the same time a model which can survive all the experimental tests. In collaboration with S. Capozziello, we looked for cosmological exact solutions for modifications of gravity in the form f(R) where f possesses a constant of motion during the evolution of the universe. In the future we plan to look for the subset of solutions which can describe experimental data from radiation domination up to today's accelerated expansion.

I have been working also in the so called f(G) gravity. This is a work made in collaboration with Shinji Tsujikawa, which aims to give some necessary conditions for a cosmologically viable f(G) gravity, where G is the Gauss-Bonnet scalar, that is a particular quadratic combination of the Riemann tensor. This scalar, G, has the property that, if not coupled, it can be written as a total derivative. Along with these conditions, we provide also some toy-models which fulfill them.

Publications in CP3
All my publications on Inspire

2010

Cosmological perturbation in f(R,G) theories with a perfect fluid.
Antonio De Felice, Jean-Marc Gerard and Teruaki Suyama
[Abstract] [PDF] [Journal] Phys. Rev. D82 (2010) 063526
Refereed paper. 14th May.

2009

Cosmological perturbations of a perfect fluid and noncommutative variables
Antonio De Felice, Jean-Marc Gerard and Teruaki Suyama
[Abstract] [PDF] [Journal] Published in Physical Review D81 (2010) 063527
Refereed paper. 25th August.
Scalar mode propagation in modified gravity with a scalar field
Antonio De Felice and Teruaki Suyama
[Abstract] [PDF] [Journal] Published in Physical Review D
Refereed paper. 31st July.
Solar system constraints on f(G) gravity models
Antonio De Felice and Shinji Tsujikawa
[Abstract] [PDF] [Journal] Published in Physical Review D
Refereed paper. 13th July.
Vacuum structure for scalar cosmological perturbations in Modified Gravity Models
Antonio De Felice and Teruaki Suyama
[Abstract] [PDF] [Journal] Published in JCAP
Refereed paper. 14th April.
Charged seven-dimensional spacetimes with spherically symmetric extra-dimensions
Antonio De Felice and Christophe Ringeval
[Abstract] [PDF] [Journal] Published in Phys. Rev. D79, 123525 (2009)
Refereed paper. 2nd April.

2008

Construction of cosmologically viable f(G) dark energy models
Antonio De Felice and Shinji Tsujikawa
[Abstract] [PDF] [Journal] Published in Physics Letters B
Refereed paper. 3rd November.
Massive gravitons trapped inside a hypermonopole
Antonio De Felice and Christophe Ringeval
[Abstract] [PDF] [Journal] Published in Physics Letters B 671, 158-161 (2009)
Refereed paper. 2nd September.
f(R) cosmology by Noether's symmetry
Antonio De Felice, Salvatore Capozziello
[Abstract] [PDF] [Journal] JCAP0808(2008)016
Refereed paper. 27th June.


[UCLouvain] - [SST] [IRMP] - [SC]
Contact : Jérôme de Favereau
Research
Job opportunities EOS be.h : 10 PhD positions
Postdoctoral position: Data Analysis and GTK operation for NA62 experiment
Postodoctoral position in precision and BSM Phenomenology
Postdoctoral Position in Precision Computations for the LHC