• Article  

      The dark energy cosmic clock: A new way to parametrise the equation of state 

      Tarrant, E. R. M.; Copeland, E. J.; Padilla, A.; Skordis, C. (2013)
      We propose a new parametrisation of the dark energy equation of state, which uses the dark energy density, Ωe as a cosmic clock. We expand the equation of state in a series of orthogonal polynomials, with Ωe as the expansion ...
    • Article  

      Modified gravity and cosmology 

      Clifton, T.; Ferreira, P. G.; Padilla, A.; Skordis, C. (2012)
      In this review we present a thoroughly comprehensive survey of recent work on modified theories of gravity and their cosmological consequences. Amongst other things, we cover General Relativity, scalar-tensor, Einstein-æther, ...
    • Article  

      The Parametrized Post-Newtonian-Vainshteinian formalism 

      Avilez-Lopez, A.; Padilla, A.; Saffin, P. M.; Skordis, C. (2015)
      Light degrees of freedom that modify gravity on cosmological scales must be ''screened on solar system scales in order to be compatible with data. The Vainshtein mechanism achieves this through a breakdown of classical ...