Professor of Mathematics Tutorial Fellow St Peter's College.
University of Oxford
Andrew Wiles Building
Radcliffe Observatory Quarter
Scattering on plane waves and the double copy
Classical and Quantum Gravity issue 1 volume 35 (5 December 2017)
Two-loop scattering amplitudes from the Riemann sphere
Physical Review D issue 12 volume 94 (1 January 2016)
Loop Integrands for Scattering Amplitudes from the Riemann Sphere.
Physical review letters issue 12 volume 115 page 121603- (16 September 2015)
Ambitwistor strings at null infinity and (subleading) soft limits
CLASSICAL AND QUANTUM GRAVITY issue 5 volume 32 (5 March 2015) Full text available
Ambitwistor strings in four dimensions.
Physical review letters issue 8 volume 113 page 081602- (19 August 2014)
Scattering amplitudes and Wilson loops in twistor space
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL issue 45 volume 44 (11 November 2011) Full text available
The polarized scattering equations for 6d superamplitudes
Physical Review Letters Full text available
Maximal-Helicity-Violating Scattering of Gluons and Gravitons in Chiral Strong Fields.
Physical review letters issue 4 volume 125 page 041602- (1 July 2020)
Supersymmetric S-matrices from the worldsheet in 10 & 11d
Physics Letters B issue 10 May 2020 volume 804 (10 March 2020)
Supertwistor description of ambitwistor strings
Journal of High Energy Physics issue 2020 volume 2020 (7 January 2020)
Celestial amplitudes and conformal soft theorems
Classical and Quantum Gravity issue 20 volume 36 page 205018-205018 (27 September 2019)
My research interests lies in mathematical physics, focussing mostly on general relativity and quantum theory.
Much of my research is centred around twistor theory, a programme originally introduced by Roger Penrose as an approach to the unification of quantum theory and general relativity. Twistor theory now has strong links to string theory and finds wide application to problems in mathematical physics, geometry, nonlinear differential equations, particularly integrable systems. Much of my current work is on ideas arising from Witten's twistor-string theory and applications of twistor theory to scattering amplitudes. Further details of my research interests can be obtained from my publication list (see below for recent articles).
Prizes, awards, and scholarships:
Leverhulme Senior Research Fellow 2005-6, Leverhulme Research Fellow 2011-13