Gary Gibbons

Gary Gibbons
Gary Gibbons at Harvard University
Born	Gary William Gibbons (1946-07-01) 1 July 1946 (age 70)
Fields	Theoretical physics Euclidean quantum gravity
Institutions	University of Cambridge Trinity College, Cambridge Max Planck Institute for Physics
Alma mater	St Catharine's College, Cambridge (BA) Clare College, Cambridge (PhD)
Thesis	Some aspects of gravitational radiation and gravitational collapse (1973)
Doctoral advisor	Dennis Sciama Stephen Hawking
Doctoral students	Mohammad Akbar Lloyd Alty Wayne Boucher Marco Cariglia Andrew Chamblin Simon Davis Steffen Gielen Domenico Giulini Carsten Gundlach Jonathan Halliwell Sean Hartnoll Carlos Herdeiro Gustav Holzegel Christopher Hull Daksh Lohiya Miguel Ortiz Christophe Patricot Dean Rasheed Peter Ruback Paulina Rychenkova Frederic P. Schuller Clive Wells Marcus C. Werner David Wiltshire
Known for	Gibbons–Hawking ansatz Gibbons–Hawking space Gibbons–Hawking effect Gibbons–Hawking–York boundary term
Notable awards	PhD (1973) FRS (1999)
Website www.damtp.cam.ac.uk/people/g.w.gibbons

Gary William Gibbons FRS (born 1 July 1946) is a British theoretical physicist.

Gibbons was born in Coulsdon, Surrey. He was educated at Purley County Grammar School and the University of Cambridge, where in 1969 he became a research student under the supervision of Dennis Sciama. When Sciama moved to the University of Oxford, he became a student of Stephen Hawking, obtaining his PhD from Cambridge in 1973.

Apart from a stay at the Max Planck Institute in Munich in the 1970s he has remained in Cambridge throughout his career, becoming a full professor in 1997, a Fellow of the Royal Society in 1999, and a Fellow of Trinity College, Cambridge in 2002.

Having worked on classical general relativity for his PhD thesis, Gibbons focused on the quantum theory of black holes afterwards. Together with Malcolm Perry, he used thermal Green's functions to prove the universality of thermodynamic properties of horizons, including cosmological event horizons. He developed the Euclidean approach to quantum gravity with Stephen Hawking, which allows a derivation of the thermodynamics of black holes from a functional integral approach. As the Euclidean action for gravity is not positive definite, the integral only converges when a particular contour is used for conformal factors.