220 citations · 747 across the 8 of their papers we have counts for
8 papers
A maximum magnetic moment to angular momentum conjecture
John D. Barrow, G. W. Gibbons
Conjectures play a central role in theoretical physics, especially those that assert an upper bound to some dimensionless ratio of physical quantities. In this paper we introduce a…
Ergoregions in Magnetised Black Hole Spacetimes
G. W. Gibbons, A. H. Mujtaba, C. N. Pope
The spacetimes obtained by Ernst's procedure for appending an external magnetic field to a seed Kerr-Newman black hole are commonly believed to be asymptotic to the static Melv…
Thoughts on Tachyon Cosmology
G. W. Gibbons
After a pedagogical review of elementary cosmology, I go on to discuss some obstacles to obtaining inflationary or accelerating universes in M/String Theory. In particular, I give…
The Melvin Universe in Born-Infeld Theory and other Theories of Non-Linear Electrodynamics
G. W. Gibbons, C. A. R. Herdeiro
We derive a Melvin Universe type solution describing a magnetic field permeating the whole Universe in gravity minimally coupled to any non-linear electromagnetic theory, including…
Born-Infeld Theory and Stringy Causality
G. W. Gibbons, C. A. R. Herdeiro
Fluctuations around a non-trivial solution of Born-Infeld theory have a limiting speed given not by the Einstein metric but the Boillat metric. The Boillat metric is S-duality inva…
Branes, AdS gravitons and Virasoro symmetry
M. Banados, A. Chamblin, G. W. Gibbons
We consider travelling waves propagating on the anti-de Sitter (AdS) background. It is pointed out that for any dimension d, this space of solutions has a Virasoro symmetry with a…
Supersymmetric Rotating Black Holes and Causality Violation
G. W. Gibbons, C. A. R. Herdeiro
The geodesics of the rotating extreme black hole in five spacetime dimensions found by Breckenridge, Myers, Peet and Vafa are Liouville integrable and may be integrated by additive…
Superconducting p-branes and Extremal Black Holes
A. Chamblin, R. Emparan, G. W. Gibbons
In Einstein-Maxwell theory, magnetic flux lines are `expelled' from a black hole as extremality is approached, in the sense that the component of the field strength normal to the h…