Zobrazeno 1 - 10
of 52
pro vyhledávání: '"Koerber, Paul"'
Publikováno v:
JHEP 1211:173,2012
We study consistent truncations of M-theory to gauged N=2 supergravity in four dimensions, based on a large class of SU(3)-structures in seven dimensions. We show that the gauging involves isometries of the vector multiplet scalar manifold as well as
Externí odkaz:
http://arxiv.org/abs/1208.1262
Autor:
Cassani, Davide, Koerber, Paul
Publikováno v:
JHEP 1201:086,2012
We establish a universal consistent Kaluza-Klein truncation of M-theory based on seven-dimensional tri-Sasakian structure. The four-dimensional truncated theory is an N=4 gauged supergravity with three vector multiplets and a non-abelian gauge group,
Externí odkaz:
http://arxiv.org/abs/1110.5327
Autor:
Danielsson, Ulf H., Haque, Sheikh S., Koerber, Paul, Shiu, Gary, Van Riet, Thomas, Wrase, Timm
Publikováno v:
Fortschr.Phys. 59: 897-933,2011
We elaborate on the construction of de Sitter solutions from IIA orientifolds of SU(3)-structure manifolds that solve the 10-dimensional equations of motion at tree-level in the approximation of smeared sources. First we classify geometries that are
Externí odkaz:
http://arxiv.org/abs/1103.4858
Autor:
Koerber, Paul
Publikováno v:
Fortsch.Phys.59:169-242,2011
In these lectures we review Generalized Complex Geometry and discuss two main applications to string theory: the description of supersymmetric flux compactifications and the supersymmetric embedding of D-branes. We start by reviewing G-structures, an
Externí odkaz:
http://arxiv.org/abs/1006.1536
Publikováno v:
JHEP 1005:090,2010
Type IIA string theory compactified on SU(3)-structure manifolds with orientifolds allows for classical de Sitter solutions in four dimensions. In this paper we investigate these solutions from a ten-dimensional point of view. In particular, we demon
Externí odkaz:
http://arxiv.org/abs/1003.3590
Autor:
Koerber, Paul, Kors, Simon
Publikováno v:
Phys.Rev.D81:105006,2010
We construct new families of non-supersymmetric sourceless type IIA AdS4 vacua on those coset manifolds that also admit supersymmetric solutions. We investigate the spectrum of left-invariant modes and find that most, but not all, of the vacua are st
Externí odkaz:
http://arxiv.org/abs/1001.0003
Autor:
Koerber, Paul
Publikováno v:
JHEP 0909:008,2009
We scan for massive type IIA SU(3)-structure compactifications of the type AdS4 x CP3 with internal symmetry group SO(4). This group acts on CP3 with cohomogeneity one, so that one would expect new non-homogeneous solutions. We find however that all
Externí odkaz:
http://arxiv.org/abs/0904.0012
Publikováno v:
JHEP 0904:010,2009
We study cosmological properties of type IIA compactifications on orientifolds of SU(3)-structure manifolds with non-vanishing geometric flux. These compactifications give rise to effective 4D N=1 supergravity theories that do not fall under some rec
Externí odkaz:
http://arxiv.org/abs/0812.3551
Autor:
Caviezel, Claudio, Koerber, Paul, Kors, Simon, Lust, Dieter, Tsimpis, Dimitrios, Zagermann, Marco
Publikováno v:
Class.Quant.Grav.26:025014,2009
We consider string theory compactifications of the form AdS4 x M6 with orientifold six-planes, where M6 is a six-dimensional compact space that is either a nilmanifold or a coset. For all known solutions of this type we obtain the four-dimensional N=
Externí odkaz:
http://arxiv.org/abs/0806.3458
Publikováno v:
JHEP 0807:017,2008
We present a classification of a large class of type IIA N=1 supersymmetric compactifications to AdS4, based on left-invariant SU(3)-structures on coset spaces. In the absence of sources the parameter spaces of all cosets leading to a solution contai
Externí odkaz:
http://arxiv.org/abs/0804.0614