61 citations · 337 across the 28 of their papers we have counts for
31 papers
Dynamics of quadratic f(R) cosmology with a perfect fluid: Jordan and Einstein frames
Artur Alho, Margarida Lima, Filipe C. Mena
We investigate the global dynamics of the field equations of (pure) quadratic theories of gravity which generalise Einstein's theory in spatially flat homogeneous and isotropic cos…
Quintessence: Quadratic potentials
Artur Alho, Claes Uggla
Arguably one can use a canonical scalar field , minimally coupled to gravity, with quadratic potentials to explore some general features of slow-roll a…
Quintessence
Artur Alho, Elsa Bernholm, Claes Uggla
Recent observations suggest that the accelerated expansion of the Universe at late times is caused by a temporally changing dark energy component, rather than the constant one in t…
New simple and accurate quintessence approximations
Artur Alho, Claes Uggla
We derive new approximations for quintessence solutions that are simpler and an order of magnitude more accurate than anything available in the literature, which from an observatio…
Tracking Quintessence
Artur Alho, Claes Uggla, John Wainwright
Tracking quintessence, in a spatially flat and isotropic space-time with a minimally coupled canonical scalar field and an asymptotically inverse power-law potential $V(φ)\proptoφ^…
Spherically symmetric elastic bodies in general relativity
Artur Alho, José Natário, Paolo Pani +1
The purpose of this review it to present a renewed perspective of the problem of self-gravitating elastic bodies under spherical symmetry. It is also a companion to the papers [Phy…