The Classification of Highly Supersymmetric Supergravity Solutions (2008)
Gran, U., Gutowski, J., Papadopoulos, G., Roest, D.
The spinorial geometry method is an effective method for constructing systematic classifications of supersymmetric supergravity solutions. Recent work on analysing highly supersymmetric solutions in...
IIB solutions with N>28 Killing spinors are maximally supersymmetric (2007)
Gran, U., Gutowski, J., Papadopoulos, G., Roest, D.
We show that all IIB supergravity backgrounds which admit more than 28 Killing spinors are maximally supersymmetric. In particular, we find that for all N>28 backgrounds the supercovariant curvature...
Geometry of four-dimensional Killing spinors (2007)
Cacciatori, S. L., Caldarelli, M. M., Klemm, D., Mansi, D. S., Roest, D.
The supersymmetric solutions of N=2, D=4 minimal ungauged and gauged supergravity are classified according to the fraction of preserved supersymmetry using spinorial geometry techniques. Subject to a...
Geometry of all supersymmetric type I backgrounds (2007)
Gran, U., Papadopoulos, G., Roest, D., Sloane, P.
We find the geometry of all supersymmetric type I backgrounds by solving the gravitino and dilatino Killing spinor equations, using the spinorial geometry technique, in all cases. The solutions of...
IIB seven-branes revisited (2007)
Ortín, T., Hartong, J., Bergshoeff, E., Roest, D.
We re-investigate the construction of half-supersymmetric seven-brane solutions of IIB supergavity. In contrast to previous approaches we allow the occurrence of objects with monodromy Tr Λ ≠ 2....
Aspects of spinorial geometry (2006)
Gran, U., Gutowski, J., Papadopoulos, G., Roest, D.
We review some aspects of the spinorial geometry approach to the classification of supersymmetric solutions of supergravity theories. In particular, we explain how spinorial geometry can be used to...
Classification of supersymmetric backgrounds of string theory (2006)
Gran, U., Gutowski, J., Papadopoulos, G., Roest, D.
We review the recent progress made towards the classification of supersymmetric solutions in ten and eleven dimensions with emphasis on those of IIB supergravity. In particular, the spinorial...
Gran, U., Gutowski, J., Papadopoulos, G., Roest, D.
We show that eleven-dimensional supergravity backgrounds with thirty one supersymmetries, N=31, admit an additional Killing spinor and so they are locally isometric to maximally supersymmetric ones....
Gran, U., Gutowski, J., Papadopoulos, G., Roest, D.
We adapt the spinorial geometry method to investigate supergravity backgrounds with near maximal number of supersymmetries. We then apply the formalism to show that the IIB supergravity backgrounds...
Maximally supersymmetric G-backgrounds of IIB supergravity (2006)
Gran, U., Gutowski, J., Papadopoulos, G., Roest, D.
We classify the geometry of all supersymmetric IIB backgrounds which admit the maximal number of $G$-invariant Killing spinors. For compact stability subgroups $G=G_2, SU(3)$ and SU(2), the spacetime...
Classical resolution of singularities in dilaton cosmologies (2005)
Bergshoeff, E. A., Collinucci, A., Roest, D., Russo, J. G., Townsend, P. K.
For models of dilaton-gravity with a possible exponential potential, such as the tensor-scalar sector of IIA supergravity, we show how cosmological solutions correspond to trajectories in a 2D Milne...
Systematics of IIB spinorial geometry (2005)
Gran, U., Gutowski, J., Papadopoulos, G., Roest, D.
We reduce the classification of all supersymmetric backgrounds of IIB supergravity to the evaluation of the Killing spinor equations and their integrability conditions, which contain the field...
Cosmological D-instantons and Cyclic Universes (2005)
Bergshoeff, E. A., Collinucci, A., Roest, D., Russo, J. G., Townsend, P. K.
For models of gravity coupled to hyperbolic sigma models, such as the metric-scalar sector of IIB supergravity, we show how smooth trajectories in the `augmented target space' connect FLRW...
Systematics of M-theory spinorial geometry (2005)
Gran, U., Papadopoulos, G., Roest, D.
We reduce the classification of all supersymmetric backgrounds in eleven dimensions to the evaluation of the supercovariant derivative and of an integrability condition, which contains the field...
Cosmological D-instantons and cyclic universes (2005)
Roest, D., Collinucci, A., Bergshoeff, E.A., Russo, J.G., Townsend, P.K.
For models of gravity coupled to hyperbolic sigma models, such as the metric-scalar sector of IIB supergravity, we show how smooth trajectories in the ‘augmented target space’ connect FLRW...
Classical resolution of singularities in dilaton cosmologies (2005)
Roest, D., Collinucci, A., Bergshoeff, E.A., Russo, J.G., Townsend, P.K.
For models of dilaton gravity with a possible exponential potential, such as the tensor–scalar sector of IIA supergravity, we show how cosmological solutions correspond to trajectories in a 2D...
Non-extremal instantons and wormholes in string theory (2005)
Roest, D., Gran, U., Collinucci, A., Bergshoeff, E., Vandoren, S.
We construct the most general non-extremal spherically symmetric instanton solution of a gravity-dilaton-axion system with SL(2,R) symmetry, for arbitrary euclidean spacetime dimension D ≥ 3. A...
Non-extremal instantons and wormholes in string theory (2004)
Bergshoeff, E., Collinucci, A., Gran, U., Roest, D., Vandoren, S.
We construct the most general non-extremal spherically symmetric instanton solution of a gravity-dilaton-axion system with $SL(2,R)$ symmetry, for arbitrary euclidean spacetime dimension $D\geq 3$. A...
M-theory and Gauged Supergravities (2004)
Abstract: We present a pedagogical discussion of the emergence of gauged supergravities from M-theory. First, a review of maximal supergravity and its global symmetries and supersymmetric solutions...
Non-extremal D-instantons (2004)
Bergshoeff, E., Collinucci, A., Gran, U., Roest, D., Vandoren, S.
We construct the most general non-extremal deformation of the D-instanton solution with maximal rotational symmetry. The general non-supersymmetric solution carries electric charges of the SL(2,R)...
Transient quintessence from group manifold reductions or how all roads lead to Rome (2004)
Gran, U., Collinucci, A., Bergshoeff, E., Nielsen, M., Roest, D.
We investigate the accelerating phases of cosmologies supported by a metric, scalars and a single exponential scalar potential. The different solutions can be represented by trajectories on a sphere...
The Bianchi classification of maximal D = 8 gauged supergravities (2004)
Ortín, T., Nielsen, M., Linares, R., Gran, U., Bergshoeff, E., Roest, D.
We construct maximal D = 8 gauged supergravities by the reduction of D = 11 supergravity over three-dimensional group manifolds. Such manifolds have been classified by Bianchi. We divide the...
Non-extremal instantons and wormholes in string theory (2004)
Bergshoeff, E., Collinucci, A., Gran, U., Roest, D., Vandoren, S.
We construct the most general non-extremal spherically symmetric instanton solution of a gravity-dilaton-axion system with SL(2,R) symmetry, for arbitrary euclidean spacetime dimension D ≥ 3. A...
Non-extremal D-instantons (2004)
Bergshoeff, E., Collinucci, A., Gran, U., Roest, D., Vandoren, S.
We construct the most general non-extremal deformation of the D-instanton solution with maximal rotational symmetry. The general non-supersymmetric solution carries electric charges of the SL(2,R)...
The Bianchi Classification of Maximal D=8 Gauged Supergravities (2003)
Bergshoeff, E A, Gran, U G, Linares, R, Nielsen, M, Ortín, T, Roest, D
We perform the generalised dimensional reduction of D=11 supergravity over three-dimensional group manifolds as classified by Bianchi. Thus, we construct eleven different maximal D=8 gauged...
Domain Walls of D=8 Gauged Supergravities and their D=11 Origin (2003)
Alonso-Alberca, N, Bergshoeff, E A, Gran, U G, Linares, R, Ortín, Tomas, Roest, D
Performing a Scherk-Schwarz dimensional reduction of D=11 supergravity on a three-dimensional group manifold we construct five D=8 gauged maximal supergravities whose gauge groups are the...
Domain Walls of D=8 Gauged Supergravities and their D=11 Origin (2003)
Alonso-Alberca, N., Bergshoeff, E., Gran, U., Linares, R., Ortin, T., Roest, D.
Performing a Scherk-Schwarz dimensional reduction of D=11 supergravity on a three-dimensional group manifold we construct five D=8 gauged maximal supergravities whose gauge groups are the...
(Non-)Abelian-gauged supergravities in nine dimensions (2003)
Linares, R., Gran, U., Wit, T. De, Bergshoeff, Eric, Roest, D.
We construct five massive deformations of the unique nine-dimensional N = 2 supergravity, each with two parameters. All these deformations have a higher-dimensional origin via Scherk–Schwarz...
(Non-)Abelian Gauged Supergravities in Nine Dimensions (2003)
Linares, R., Gran, U., Wit, T. De, Bergshoeff, E., Roest, D.
We construct five massive deformations of the unique nine–dimensional N = 2 supergravity, each with two parameters. All of these deformations have a higher–dimensional origin via Scherk–Schwarz...
(Non-)Abelian Gauged Supergravities in Nine Dimensions (2002)
Bergshoeff, E., De Wit, T., Gran, U., Linares, R., Roest, D.
We construct five different two-parameter massive deformations of the unique nine-dimensional N=2 supergravity. All of these deformations have a higher-dimensional origin via Scherk-Schwarz reduction...
Type IIB Seven-brane Solutions from Nine-dimensional Domain Walls (2002)
Bergshoeff, E., Gran, U., Roest, D.
We investigate half-supersymmetric domain wall solutions of four maximally supersymmetric D=9 massive supergravity theories obtained by Scherk-Schwarz reduction of D=10 IIA and IIB supergravity. One...
Massive dualities in six dimensions (2002)
Sundell, P., Roest, D., Bergshoeff, E., Behrndt, K.
We study compactifications of string theory and M-theory to six dimensions with background fluxes. The non-zero fluxes lead to additional mass parameters. We derive the S- and T-duality rules for the...
Type IIB 7-brane solutions from nine-dimensional domain walls (2002)
Gran, U., Bergshoeff, E., Roest, D.
We investigate half-supersymmetric domain wall solutions of four maximally supersymmetric D = 9 massive supergravity theories obtained by Scherk–Schwarz reduction of D = 10 IIA and IIB...
Massive Dualities in Six Dimensions (2001)
Behrndt, K., Bergshoeff, E., Roest, D., Sundell, P.
We study compactifications of string theory and M-theory to six dimensions with background fluxes. The nonzero fluxes lead to additional mass parameters. We derive the S- and T-duality rules for the...
New formulations of D=10 supersymmetry and D8-O8 domain walls (2001)
Bergshoeff, E, Kallosh, R, Ortin, T, Roest, D
We discuss a generalized form of IIA/IIB supergravity depending on all R-R potentials C-(p) (p = 0, 1,..., 9) as the effective field theory of type IIA/IIB superstring theory. For the IIA case we...
Brane plus Bulk Supersymmetry in Ten Dimensions (2001)
Bergshoeff, E., Kallosh, R., Ortin, T., Roest, D., Van Proeyen, A.
We discuss a generalized form of IIA/IIB supergravity depending on all R-R potentials C^(p) (p=0,1,...,9) as the effective field theory of Type IIA/IIB superstring theory. For the IIA case we...
New Formulations of D=10 Supersymmetry and D8-O8 Domain Walls (2001)
Bergshoeff, E., Kallosh, R., Ortin, T., Roest, D., Van Proeyen, A.
We discuss a generalized form of IIA/IIB supergravity depending on all R-R potentials C^(p) (p=0,1,...,9) as the effective field theory of Type IIA/IIB superstring theory. For the IIA case we...
Brane plus bulk supersymmetry in ten-dimensions (2001)
Bergshoeff, E, Kallosh, R, Ortin, T, Roest, D
Katholieke Universiteit Leuven, Faculteit Wetenschappen, Departement Natuurkunde en Sterrenkunde, Celestijnenlaan 200D, 3001 Leuven