"Those of us engaged in
scientific research generally do it because we can't help it - because
Nature is the biggest and most complicated jumbo holiday crossword puzzle
you have ever seen" - Ed Hinds, New Scientist Sept.
1997
I am currently working on aspects of cosmology, particularly the Cosmic Microwave Background (CMB - the radiation left over from the big bang) and how it is gravitationally lensed. I'm interested the theoretical models of the early universe, as well as comparing observations with cosmological models. I was part of the core team analysing data from the Planck satellite and now part of the Simons Observatory collaboration (amongst others). I'm a professor at the University of Sussex,
Key papers listed below (complete list on the
arXiv, and inSPIRE):
Cobaya: Code for Bayesian Analysis of hierarchical physical models arXiv:2005.05290
CMB lensing reconstruction biases in cross-correlation with large-scale structure probes arXiv:1906.08760
Planck 2018 results. VIII. Gravitational lensing arXiv:1807.06210
Planck 2018 results. VI. Cosmological parameters arXiv:1807.06209
Emission-angle and polarization-rotation effects in the lensed CMB arXiv:1706.02673
Internal delensing of Planck CMB temperature and polarization arXiv:1701.01712
Efficient computation of CMB anisotropies is closed FRW
models. Ap. J. 538:473-476, (2000).
astro-ph/9911177. See the CAMB home page.
Quadratic Lagrangians and Topology in Gauge Theory Gravity GRG 32:1, 161 (2000). gr-qc/9910039.
Electron Scattering in the Spacetime Algebra
In Clifford Algebras and their applications in mathematical
physics vol. 1, eds. R. Ablamowicz and B. Fauser, 2000.
Postscript
Electron scattering without spin sums Int. J. Theor. Phys. 40(1) (2001)
My PhD was with Anthony Lasenby at the Cavendish, Cambridge on applications of Geometric Algebra and
covariant methods in physics. GA is unifying mathematical framework for
dealing with geometric objects, subsuming vector calculus, complex
analysis, tensor calculus, differential forms, and more. I've written an
introduction to the subject which I hope should be quite accessible and
is now the second chapter of my thesis.
Download a Postscript
copy.
After my three years of PhD I spent two years postdoc at DAMTP in Cambridge. It then spent 2 and a half years at CITA, University of Toronto and 4 months at the CfA, Harvard. On returning to the UK I spent four-and-a-bit years in the Cambridge Institute of Astronomy/KICC as an STFC Advanced fellow before getting my current position in Sussex.