Career
- 1974-1976: Research Fellow, Girton College, Cambridge
- 1976-present: Official Fellow, College Lecturer and Director of Studies in Mathematics, Girton College
- 1991-1994: Temporary Lecturer, DAMTP, Cambridge
- 1994-2002: Assistant Director of Research, DAMTP
- 2002-present: Reader in Mathematical Physics, DAMTP
Research
Discrete gravity, both classical and quantum, mainly based on Regge calculus; spin foam models. The role of holonomy in quantum gravity. The variation of Newton's constant.
Selected Publications
- Discrete structures in physics, J. Math. Phys. 41 (2000) 3964-3984 (with T. Regge).
- 6j-symbols and discrete quantum gravity, Nucl. Phys. B (Proc. Suppl.) 88 (2000) 124-131.
- Flat and curved space-times: Second edition, Oxford University Press (2000) (with G. F. R. Ellis).
- Gluing 4-simplices: a derivation of the Barrett-Crane spin foam model for Euclidean quantum gravity, Phys. Rev. D63 (2001) 024022 (with D. Oriti).
- Constraints on area variables in Regge calculus, Class. Quantum Grav. 18 (2001) L43-46 (with J. M\"akel\"a).
- Non-perturbative gravity and the spin of the lattice graviton, Phys. Rev. D70 (2004) 124007 (with H. W. Hamber).
- Area Regge calculus and discontinuous metrics, Class. Quantum Grav. 21 (2004) 4865-4880 (with C. J. Wainwright).
- Nonlocal effective gravitational field equations and the running of Newton's constant G, Phys. Rev. D72 (2005) 04426 (with H. W. Hamber).
- Nonlocal effective field equations for quantum cosmology, Mod. Phys. Lett. A 21 (2006) 735 (with H. W. Hamber).
- Quantum gravity in large dimensions, Phys. Rev. D73 (2006) 04403 (with H. W. Hamber).
- Discrete quantum gravity, Journal of Physics: Conference Series 33 (2006) 38-48.
- Bertha Swirles Jeffreys, in Out of the Shadows: Contributions of Twentieth-Century Women to Physics, edited by Nina Byers and Gary Williams (CUP, 2006).
- Constraints on the gravitational scaling dimension from the non-local effective field equations, Phys. Lett. B643 (2006) 228 (with H. W. Hamber).
- Renormalization group running of Newton's G: the static isotropic case, Phys. Rev. D75 (2007) 084014 (with H. W. Hamber).
- Gravitational Wilson loop and large scale curvature, Phys. Rev. D76 (2007) 84008 (with H. W.Hamber).
Publications
The convergence of lattice solutions of linearised Regge calculus
– Classical and Quantum Gravity
(1999)
5,
1543
(DOI: 10.1088/0264-9381/5/12/007)
A 3+1 Regge calculus model of the Taub universe
– Classical and Quantum Gravity
(1999)
5,
155
(DOI: 10.1088/0264-9381/5/1/020)
A note on area variables in Regge calculus
– Classical and Quantum Gravity
(1999)
16,
1373
(DOI: 10.1088/0264-9381/16/4/025)
Gauge invariance in simplicial gravity
– Nuclear Physics B
(1997)
487,
345
Recent progress in Regge calculus
– Nuclear and Particle Physics Proceedings
(1997)
57,
73
Parallelizable implicit evolution scheme for Regge calculus
– International Journal of Theoretical Physics
(1997)
36,
815
(DOI: 10.1007/BF02435787)
Discrete gravity in one dimension
– Nuclear Physics, Section B
(1995)
451,
305
(DOI: 10.1016/0550-3213(95)00358-y)
Newtonian potential in quantum Regge gravity
– Nuclear Physics, Section B
(1995)
435,
361
(DOI: 10.1016/0550-3213(94)00495-z)
SIMPLICIAL QUANTUM-GRAVITY IN 4 DIMENSIONS AND INVARIANTS OF DISCRETIZED MANIFOLDS
– Journal of Mathematical Physics
(1995)
36,
6276
(DOI: 10.1063/1.531244)
Simplical gravity coupled to scalar matter
– Nuclear Physics B
(1994)
415,
463
(DOI: 10.1016/0550-3213(94)90119-8)
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