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, and on the committee of the Australasian Society for General Relativity and Gravitation.

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 four PhD students: Yongzhuang Li, Ahsan Nazer, Cathy Neill and Nezihe Uzun; and one MSc student: James McKay. 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 Matt Visser's group at Victoria University of Wellington.

Gravitational energy as dark energy

Selected papers:
Cosmic structure, averaging and dark energy arXiv:1311.5787;
Timescape cosmology with radiaton fluid: Class. Quantum Grav. 30 (2013) 175006;
Hubble flow variance and the cosmic rest frame - Physical Review D 88 (2013) 083529;
What is dust? - Physical foundations of the averaging problem in cosmology: Class. Quantum Grav. 28 (2011) 164006;
Supernova tests of the timescape cosmology: Mon. Not. R. Astron. Soc. 413 (2011) 367-385;
Average observational quantities in the timescape cosmology: Physical Review D 80 (2009) 123512;
Cosmological equivalence principle and the weak-field limit: Physical Review D 78 (2008) 084032;
Physical Review Letters 99 (2007) 251101; and Astrophysical Journal 672 (2008) L91.

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. More recently, in December 2009, I organised ACGRG5.