Tensor ghosts in the inflationary cosmology (2009)
Theories with curvature squared terms in the action are known to contain ghost modes in general. However, if we regard curvature squared terms as quantum corrections to the original theory, the...
Relics of spatial curvature in the primordial non-gaussianity (2009)
We study signatures in the Cosmic Microwave Background (CMB) induced by the presence of strong spatial curvature prior to the epoch of inflation which generated our present universe. If inflation...
The No-Boundary Probability for the Universe starting at the top of the hill (2007)
We use the Hartle-Hawking No-Boundary Proposal to make a comparison between the probabilities of the universe starting near, and at, the top of a hill in the effective potential. In the context of...
On Gauss-Bonnet black hole entropy (2004)
Clunan, Tim, Ross, Simon F., Smith, Douglas J.
We investigate the entropy of black holes in Gauss-Bonnet and Lovelock gravity using the Noether charge approach, in which the entropy is given as the integral of a suitable (n-2) form charge over...