David L Wiltshire

I am a Professor in the Phone: (+64 3) 364 2473 Fax: (+64 3) 364 2469

Email: David.Wiltshire AT canterbury.ac.nz

My research interests are in general relativity, cosmology and quantum gravity. I am a member of the editorial board of Classical and Quantum Gravity, on the committee of the Australasian Society for General Relativity and Gravitation, and Vice-President of the New Zealand Institute of Physics.

Amongst the permanent faculty in theoretical physics my research interests most closely intersect with those of Jenni Adams and Chris Gordon.

My research is currently focused on understanding gravitational energy in an inhomogeneous universe: it is my thesis that is the key to understanding the mystery of "dark energy". I have a viable alternative to the standard cosmology, without dark energy, which I have named the timescape cosmology. In the past I have been Principal Investigator on two Marsden grants. I currently supervise two PhD students: Yongzhuang Li and Cathy Neill; and one MSc student: Lawrence Dam. Some recent postdocs in our group, who have now moved on, were Teppo Mattsson and Ishwaree Neupane. Emeritus Professor Roy Kerr was an active member of our group until a recent move to Tauranga. We have on-going interactions with Thomas Buchert's group at the Université de Lyon 1, and Matt Visser's group at Victoria University of Wellington.

Podcast: Gravitational waves from colliding black holes (Interview with Kim Hill 13 February 2016)

Op-ed: New windows on the Universe (about LIGO announcement 12 February 2016)

CQG+ Author Insight: The Universe is inhomogeneous. Does it matter? (20 January 2016)

Gravitational energy as dark energy

Selected papers:
Differential expansion of space and the Hubble flow anisotropy: arXiv:1512.07364;
Defining the frame of minimum nonlinear Hubble expansion variation: Mon. Not. R. Astron. Soc. 457 (2016) 3285-3305;
Quasilocal energy and thermodynamic equilibrium conditions: Class. Quant. Grav. 32 (2015) 165011;
Cosmic microwave background anisotropies in the timescape cosmology: Physical Review D 91 (2015) 063519;

Cosmic Clocks, Cosmic Variance and Cosmic Averages, New J. Phys. 9 (2007) 377, Focus on Dark Energy

The Kerr Spacetime: Rotating Black Holes in General Relativity
(Cambridge University Press, 2009)

Kerr Fest - In August, 2004, I organised a Symposium on black holes in astrophysics, general relativity and quantum gravity, in celebration of Professor Roy Kerr's 70th birthday. Five years later, in December 2009, I organised ACGRG5.