161 citations · 1.5k across the 25 of their papers we have counts for
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All homogeneous N=2 M-theory truncations with supersymmetric AdS4 vacua
Davide Cassani, Paul Koerber, Oscar Varela
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…
Tri-Sasakian consistent reduction
Davide Cassani, Paul Koerber
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 su…
De Sitter hunting in a classical landscape
Ulf H. Danielsson, Sheikh S. Haque, Paul Koerber +3
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 ap…
Lectures on Generalized Complex Geometry for Physicists
Paul Koerber
In these lectures we review Generalized Complex Geometry and discuss two main applications to string theory: the description of supersymmetric flux compactifications and the supers…
Universal de Sitter solutions at tree-level
Ulf H. Danielsson, Paul Koerber, Thomas Van Riet
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 s…
A landscape of non-supersymmetric AdS vacua on coset manifolds
Paul Koerber, Simon Kors
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 lef…
Coisotropic D-branes on AdS4 x CP3 and massive deformations
Paul Koerber
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…
The effective theory of type IIA AdS4 compactifications on nilmanifolds and cosets
Claudio Caviezel, Paul Koerber, Simon Kors +3
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.…
Type IIA AdS4 compactifications on cosets, interpolations and domain walls
Paul Koerber, Dieter Lust, Dimitrios Tsimpis
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 s…
Warped generalized geometry compactifications, effective theories and non-perturbative effects
P. Koerber, L. Martucci
Summarizing the results of arXiv:0707.1038, we discuss the four-dimensional effective approach to type II N=1 supersymmetric flux compactifications with general SU(3)x SU(3)-struct…
D-branes on AdS flux compactifications
Paul Koerber, Luca Martucci
We study D-branes in N=1 flux compactifications to AdS_4. We derive their supersymmetry conditions and express them in terms of background generalized calibrations. Basically becau…
From ten to four and back again: how to generalize the geometry
Paul Koerber, Luca Martucci
We discuss the four-dimensional N=1 effective approach in the study of warped type II flux compactifications with SU(3)x SU(3)-structure to AdS_4 or flat Minkowski space-time. The…
Supersymmetric sources, integrability and generalized-structure compactifications
Paul Koerber, Dimitrios Tsimpis
In the context of supersymmetric compactifications of type II supergravity to four dimensions, we show that orientifold sources can be compatible with a generalized SU(3) x SU(3)-s…
Deformations of calibrated D-branes in flux generalized complex manifolds
Paul Koerber, Luca Martucci
We study massless deformations of generalized calibrated cycles, which describe, in the language of generalized complex geometry, supersymmetric D-branes in N=1 supersymmetric comp…
Poincare Invariance in Multiple D-brane Actions
Dominic Brecher, Paul Koerber, Henry Ling +1
We show that the requirement of Poincare invariance (more specifically invariance under boosts/rotations that mix brane directions with transverse directions) places severe constra…
Stable D-branes, calibrations and generalized Calabi-Yau geometry
Paul Koerber
We introduce generalized calibrations that take into account the gauge field on the D-brane so that calibrated submanifolds minimize the Dirac-Born-Infeld energy. We establish the…
Towards an Effective Action for D-Branes
Arjan Keurentjes, Paul Koerber, Stijn Nevens +2
We introduce and review several indirect methods to calculate the effective action for a single D-brane or a set of coinciding D-branes.
Abelian and Non-abelian D-brane Effective Actions
Paul Koerber
In this Ph.D. thesis we review and elaborate on a method to find the D-brane effective action, based on BPS equations. Firstly, both for the Yang-Mills action and the Born-Infeld a…
Supersymmetric non-linear sigma-models with boundaries revisited
Paul Koerber, Stijn Nevens, Alexander Sevrin
We study two-dimensional supersymmetric non-linear sigma-models with boundaries. We derive the most general family of boundary conditions in the non-supersymmetric case. Next we sh…
The non-abelian D-brane effective action through order
Paul Koerber, Alexander Sevrin
Requiring the existence of certain BPS solutions to the equations of motion, we determine the bosonic part of the non-abelian D-brane effective action through order . We al…
Testing the fermionic terms in the non-abelian D-brane effective action through order
Mees de Roo, Martijn G. C. Eenink, Paul Koerber +1
Recently the construction of the non-abelian effective D-brane action was performed through order including the terms quadratic in the gauginos. This result can be tested…
Getting the D-brane effective action from BPS configurations
Paul Koerber, Alexander Sevrin
We review a method to find the non-abelian open superstring effective action, thereby settling the issue of the ordering ambiguities. We start from solutions to Yang-Mills which, i…
The non-abelian open superstring effective action through order
Paul Koerber, Alexander Sevrin
Using the method developed in {\tt hep-th/0103015}, we determine the non-abelian Born-Infeld action through . We start from solutions to a Yang-Mills theory which…
Testing the term in the non-abelian open superstring effective action
Paul Koerber, Alexander Sevrin
Recently, a proposal for the full non-abelian open superstring effective action through has been formulated in {\tt hep-th/0108169}. We test this result by calcu…