99 citations · 890 across the 30 of their papers we have counts for
31 papers
Infinite and finite consistent truncations on deformed generalised parallelisations
Chris D. A. Blair, Martin Pico, Oscar Varela
Given a manifold admitting a maximally supersymmetric consistent truncation, we show how to formulate new consistent truncations by restricting to a set of Kaluza-Klei…
Generalised U-dual solutions via ISO(7) gauged supergravity
Chris D. A. Blair, Sofia Zhidkova
We study a solution generating technique in supergravity which can be viewed as a generalised version of U-duality, taking solutions of type IIA supergravity on a 6-sphere with RR…
Doubled space and extended supersymmetry
Chris D. A. Blair, Ondrej Hulik, Alexander Sevrin +1
The doubled formulation of the worldsheet provides a description of string theory in which T-duality is promoted to a manifest symmetry. Here we extend this approach to $\mathcal{N…
Non-isometric U-dualities
Chris D. A. Blair
I study generalisations of U-duality transformations which do not rely on the existence of isometries. I start by providing more details of a recently proposed generalised U-dualit…
Generalised U-dual solutions in supergravity
Chris D. A. Blair, Sofia Zhidkova
We discuss the notion of generalised U-duality as a solution generating technique in supergravity. We demonstrate a method to take solutions of type IIA supergravity on a 3-sphere,…
A QP perspective on topology change in Poisson-Lie T-duality
Alex S. Arvanitakis, Chris D. A. Blair, Daniel C. Thompson
We describe topological T-duality and Poisson-Lie T-duality in terms of QP (differential graded symplectic) manifolds and their canonical transformations. Duality is mediated by a…
A non-relativistic limit of M-theory and 11-dimensional membrane Newton-Cartan geometry
Chris D. A. Blair, Domingo Gallegos, Natale Zinnato
We consider a non-relativistic limit of the bosonic sector of eleven-dimensional supergravity, leading to a theory based on a covariant `membrane Newton-Cartan' (MNC) geometry. The…
Non-Riemannian isometries from double field theory
Chris D. A. Blair, Gerben Oling, Jeong-Hyuck Park
We explore the notion of isometries in non-Riemannian geometries. Such geometries include and generalise the backgrounds of non-relativistic string theory, and they can be naturall…
Exploring Exceptional Drinfeld Geometries
Chris D. A. Blair, Daniel C. Thompson, Sofia Zhidkova
We explore geometries that give rise to a novel algebraic structure, the Exceptional Drinfeld Algebra, which has recently been proposed as an approach to study generalised U-dualit…
The Geometry, Branes and Applications of Exceptional Field Theory
David S. Berman, Chris D. A. Blair
This is a review of exceptional field theory: a generalisation of Kaluza-Klein theory that unifies the metric and -form gauge field degrees of freedom of supergravity into a gen…
Non-relativistic duality and deformations
Chris D. A. Blair
We make some observations connecting non-relativistic limits of string theory with deformations and TsT transformations.
A worldsheet supersymmetric Newton-Cartan string
Chris D. A. Blair
We construct a (locally) supersymmetric worldsheet action for a string in a non-relativistic Newton-Cartan background. We do this using a doubled string action, which describes the…
Open exceptional strings and D-branes
Chris D. A. Blair
We study D-branes in the extended geometry appearing in exceptional field theory (or exceptional generalised geometry). Starting from the exceptional sigma model (an cov…
Orbifolds and Orientifolds as O-folds
Chris D. A. Blair
We consider quotients of string and M-theory by discrete subgroups of the U-duality group. This results in what we call O-folds, which are generalisations of orbifolds and orientif…
Non-Riemannian geometry of M-theory
David S. Berman, Chris D. A. Blair, Ray Otsuki
We construct a background for M-theory that is moduli free. This background is then shown to be related to a topological phase of the exceptional field theory (…
O-folds: Orientifolds and Orbifolds in Exceptional Field Theory
Chris D. A. Blair, Emanuel Malek, Daniel C. Thompson
We describe conventional orientifold and orbifold quotients of string and M-theory in a unified approach based on exceptional field theory (ExFT). Using an extended spacetime, ExFT…
The Exceptional Sigma Model
Alex S. Arvanitakis, Chris D. A. Blair
We detail the construction of the exceptional sigma model, which describes a string propagating in the "extended spacetime" of exceptional field theory. This is to U-duality as the…
Type II strings are Exceptional
Alex S. Arvanitakis, Chris D. A. Blair
We construct the exceptional sigma model: a two-dimensional sigma model coupled to a supergravity background in a manifestly (formally) -covariant manner. This formulatio…
Five-brane actions in double field theory
Chris D. A. Blair, Edvard T. Musaev
We construct an action for NSNS 5-branes which is manifestly covariant under O(d,d). This is done by doubling of the spacetime coordinates which appear in the worldvolume actio…
Particle actions and brane tensions from double and exceptional geometry
Chris D. A. Blair
Massless particles in dimensions lead to massive particles in dimensions on Kaluza-Klein reduction. In string theory, wrapped branes lead to multiplets of massive particl…
Doubled strings, negative strings and null waves
Chris D. A. Blair
We revisit the fundamental string (F1) solution in the doubled formalism. We show that the wave-like solution of double field theory (DFT) corresponding to the F1/pp-wave duality p…
Black hole thermodynamics, stringy dualities and double field theory
Alex S. Arvanitakis, Chris D. A. Blair
We discuss black hole thermodynamics in the manifestly duality invariant formalism of double field theory (DFT). We reformulate and prove the first law of black hole thermodynamics…
An Action for F-theory: Exceptional Field Theory
David S. Berman, Chris D. A. Blair, Emanuel Malek +1
We construct the 12-dimensional exceptional field theory associated to the group . Demanding the closure of the algebra of local symmetries lea…
Conserved Currents of Double Field Theory
Chris D. A. Blair
We find the conserved current associated to invariance under generalised diffeomorphisms in double field theory. This can be used to define a generalised Komar integral. We comment…