Gravitating Opposites Attract (2009)
Beig, Robert, Gibbons, Gary W., Schoen, Richard M.
Generalizing previous work by two of us, we prove the non-existence of certain stationary configurations in General Relativity having a spatial reflection symmetry across a non-compact surface...
The Bernstein Conjecture, Minimal Cones, and Critical Dimensions (2009)
Gibbons, Gary W., Maeda, Kei-ichi, Miyamoto, Umpei
Minimal surfaces and domain walls play important roles in various contexts of spacetime physics as well as material science. In this paper, we first review the Bernstein conjecture, which asserts...
Gravitational Dual of Tachyon Condensation (2009)
Gibbons, Gary W., Hashimoto, Koji, Hirano, Shinji
We study a system of N D3-branes in which open string tachyons survive in the low energy alpha' -> 0 limit. We compute the height of the tachyon potential both in the weak and strong couplings by...
Deformed General Relativity and Torsion (2009)
Gibbons, Gary W., Gielen, Steffen
We argue that the natural framework for embedding the ideas of deformed, or doubly, special relativity (DSR) into a curved spacetime is a generalisation of Einstein-Cartan theory, considered by...
Measures on Mixing Angles (2008)
Gibbons, Gary W., Gielen, Steffen, Pope, C. N., Turok, Neil
We address the problem of the apparently very small magnitude of CP violation in the standard model, measured by the Jarlskog invariant J. In order to make statements about probabilities for certain...
Naturalness of CP Violation in the Standard Model (2008)
Gibbons, Gary W., Gielen, Steffen, Pope, C. N., Turok, Neil
We construct a natural measure on the space of CKM matrices in the standard model, assuming the fermion mass matrices are randomly selected from a distribution which fits the observed quark mass...
The Petrov and Kaigorodov-Ozsv\'ath Solutions: Spacetime as a Group Manifold (2008)
Gibbons, Gary W., Gielen, Steffen
The Petrov solution (for $\Lambda=0$) and the Kaigorodov-Ozsv\'ath solution (for $\Lambda
Decay of Massive Dirac Hair on a Brane-World Black Hole (2008)
Gibbons, Gary W., Rogatko, Marek, Szyp\lowska, Agnieszka
We investigate the intermediate and late-time behaviour of the massive Dirac spinor field in the background of static spherically symmetric brane-world black hole solutions. The intermediate...
The Decay of Dirac Hair around a Dilaton Black Hole (2008)
Gibbons, Gary W., Rogatko, Marek
The intermediate and late-time behaviour of a massive Dirac field in the background of static spherically symmetric black hole solutions is investigated. The intermediate asymptotic behaviour of a...
Bergshoeff, Eric A., Gibbons, Gary W., Townsend, Paul K.
We show how, in heterotic M-theory, an M5-brane in the 11-dimensional bulk may end on an ``M9-brane'' boundary, the M5-brane boundary being a Yang monopole 4-brane. This possibility suggests various...
Townsend, Paul K., Gibbons, Gary W., Bergshoeff, Eric A.
We show how, in heterotic M theory, an M5-brane in the 11-dimensional bulk may end on an ‘‘M9-brane’’ boundary, the M5-brane boundary being a Yang-monopole 4-brane. This possibility suggests...
Nonlinear perturbations of the Kaluza-Klein monopole (2006)
Bizon, Piotr, Chmaj, Tadeusz, Gibbons, Gary W.
We consider the nonlinear stability of the Kaluza-Klein monopole viewed as the static solution of the five dimensional vacuum Einstein equations. Using both numerical and analytical methods we give...
Freedman, Daniel Z., Gibbons, Gary W., Schnabl, Martin
Some speculative preliminary ideas relating matrix theory and cosmology are discussed.
On the stability of naked singularities (2004)
Gibbons, Gary W., Hartnoll, Sean A., Ishibashi, Akihiro
We study the linearised stability of the nakedly singular negative mass Schwarzschild solution against gravitational perturbations. There is a one parameter family of possible boundary conditions at...
Properties of some five dimensional Einstein metrics (2004)
Gibbons, Gary W., Hartnoll, Sean A., Yasui, Yukinori
The volumes, spectra and geodesics of a recently constructed infinite family of five-dimensional inhomogeneous Einstein metrics on the two $S^3$ bundles over $S^2$ are examined. The metrics are in...
Topology and Signature Changes in Braneworlds (2004)
Gibbons, Gary W., Ishibashi, Akihiro
It has been believed that topology and signature change of the universe can only happen accompanied by singularities, in classical, or instantons, in quantum, gravity. In this note, we point out...
Uniqueness of (dilatonic) charged black holes and black p-branes in higher dimensions (2002)
Gibbons, Gary W., Ida, Daisuke, Shiromizu, Tetsuya
We prove the uniqueness of higher dimensional (dilatonic) charged black holes in static and asymptotically flat spacetimes for arbitrary vector-dilaton coupling constant. An application to the...
Uniqueness and non-uniqueness of static black holes in higher dimensions (2002)
Gibbons, Gary W., Ida, Daisuke, Shiromizu, Tetsuya
We prove a uniqueness theorem for asymptotically flat static charged dilaton black hole solutions in higher dimensional space-times. We also construct infinitely many non-asymptotically flat regular...
Uniqueness and non-uniqueness of static vacuum black holes in higher dimensions (2002)
Gibbons, Gary W., Ida, Daisuke, Shiromizu, Tetsuya
We prove the uniqueness theorem for asymptotically flat static vacuum black hole solutions in higher dimensional space-times. We also construct infinitely many non-asymptotically flat regular static...
Convex Functions and Spacetime Geometry (2000)
Gibbons, Gary W., Ishibashi, Akihiro
Convexity and convex functions play an important role in theoretical physics. To initiate a study of the possible uses of convex functions in General Relativity, we discuss the consequences of a...
Non-Linear Electrodynamics in Curved Backgrounds (2000)
Gibbons, Gary W., Hashimoto, Koji
We study non-linear electrodynamics in curved space from the viewpoint of dualities. After establishing the existence of a topological bound for self-dual configurations of Born-Infeld field in...
Intersecting domain walls in MQCD (2000)
Gauntlett, Jerome P., Gibbons, Gary W., Townsend, Paul K.
We argue that MQCD admits intersecting domain walls that are realized as Cayley calibrations of the MQCD M5-brane. We discuss various dual realizations and comment on how branes can realise domain...
BPS states of D=4 N=1 supersymmetry (2000)
Gauntlett, Jerome P., Gibbons, Gary W., Hull, Christopher M., Townsend, Paul K.
We find the combinations of momentum and domain-wall charges corresponding to BPS states preserving 1/4, 1/2 or 3/4 of D=4 N=1 supersymmetry, and we show how the supersymmetry algebra implies their...
Isometric Embedding of BPS Branes in Flat Spaces with Two Times (1999)
Andrianopoli, Laura, Derix, Martijn, Gibbons, Gary W., Herdeiro, Carlos, Santambrogio, Alberto, Van Proeyen, Antoine
We show how non-near horizon p-brane theories can be obtained from two embedding constraints in a flat higher dimensional space with 2 time directions. In particular this includes the construction of...
Black Holes and Critical Points in Moduli Space (1997)
Ferrara, Sergio, Gibbons, Gary W., Kallosh, Renata
We study the stabilization of scalars near a supersymmetric black hole horizon using the equation of motion of a particle moving in a potential and background metric. When the relevant 4-dimensional...
Enhancement of Supersymmetry Near 5d Black Hole Horizon (1996)
Chamseddine, Ali, Ferrara, Sergio, Gibbons, Gary W., Kallosh, Renata
Geometric Killing spinors which exist on AdS_{p+2} X S^{d-p-2} sometimes may be identified with supersymmetric Killing spinors. This explains the enhancement of unbroken supersymmetry near the...
Instantons and seven-branes in type IIB superstring theory (1995)
Gibbons, Gary W., Green, Michael B., Perry, Malcolm J.
Instanton and seven-brane solutions of type IIB supergravity carrying charges in the Ramond-Ramond sector are constructed. The singular seven-brane has a quantized \RR \ \lq magnetic' charge whereas...
The Physics of 2-d Stringy Spacetimes (1992)
Gibbons, Gary W., Perry, Malcolm J.
We examine the two-dimensional spacetimes that emerge from string theory. We find all the solutions with no tachyons, and show that the only non-trivial solution is the black hole spacetime. We...
Workshop on the Formation and Evolution of Cosmic Strings (1991)
Gibbons, Gary W, Hawking, Stephen William, Vachaspati, Tanmay