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Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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20 papers · 2 filters
Generalized Kahler geometry and gerbes
C. M. Hull, U. Lindström, M. Roček +2
We introduce and study the notion of a biholomorphic gerbe with connection. The biholomorphic gerbe provides a natural geometrical framework for generalized Kahler geometry in a ma…
Finite size giant magnons in the SU(2) x SU(2) sector of AdS_4 x CP^3
Tomasz Lukowski, Olof Ohlsson Sax
We use the algebraic curve and Luscher's mu-term to calculate the leading order finite size corrections to the dispersion relation of giant magnons in the SU(2) x SU(2) sector of A…
Chain inflation and the imprint of fundamental physics in the CMBR
Diego Chialva, Ulf H. Danielsson
In this work we investigate characteristic modifications of the spectrum of cosmological perturbations and the spectral index due to chain inflation. We find two types of effects.…
Topological branes, p-algebras and generalized Nahm equations
Giulio Bonelli, Alessandro Tanzini, Maxim Zabzine
Inspired by the recent advances in multiple M2-brane theory, we consider the generalizations of Nahm equations for arbitrary p-algebras. We construct the topological p-algebra quan…
Aspects of quantum integrability for pure spinor superstring in AdS(5)xS(5)
Valentina Giangreco M. Puletti
We consider the monodromy matrix for the pure spinor IIB superstring on at leading order at strong coupling, in particular its variation under an infinitesimal an…
MHV, CSW and BCFW: field theory structures in string theory amplitudes
Rutger Boels, Kasper J. Larsen, Niels A. Obers +1
Motivated by recent progress in calculating field theory amplitudes, we study applications of the basic ideas in these developments to the calculation of amplitudes in string theor…
Consistent boundary conditions for cosmological topologically massive gravity at the chiral point
Daniel Grumiller, Niklas Johansson
We show that cosmological topologically massive gravity at the chiral point allows not only Brown-Henneaux boundary conditions as consistent boundary conditions, but slightly more…
Nonabelian Generalized Gauge Multiplets
Ulf Lindstrom, Martin Rocek, Itai Ryb +2
We give the nonabelian extension of the newly discovered N = (2, 2) two-dimensional vector multiplets. These can be used to gauge symmetries of sigma models on generalized Kahler g…
Finite-size corrections in the SU(2) x SU(2) sector of type IIA string theory on AdS_4 x CP^3
Davide Astolfi, Valentina Giangreco M. Puletti, Gianluca Grignani +2
We consider finite-size corrections in the SU(2) x SU(2) sector of type IIA string theory on AdS_4 x CP^3, which is the string dual of the recently constructed N=6 superconformal C…
Properties of hyperkahler manifolds and their twistor spaces
Ulf Lindstrom, Martin Rocek
We describe the relation between supersymmetric sigma-models on hyperkahler manifolds, projective superspace, and twistor space. We review the essential aspects and present a coher…
The Bethe ansatz for superconformal Chern-Simons
J. A. Minahan, K. Zarembo
We study the anomalous dimensions for scalar operators for a three-dimensional Chern-Simons theory recently proposed in arXiv:0806.1218. We show that the mixing matrix at two-loop…
Superconformal Chern-Simons Theories and AdS_4/CFT_3 Correspondence
Marcus Benna, Igor Klebanov, Thomas Klose +1
We discuss the N=2 superspace formulation of the N=8 superconformal Bagger-Lambert-Gustavsson theory, and of the N=6 superconformal Aharony-Bergman-Jafferis-Maldacena U(N)xU(N) Che…
4D N = 2 Supergravity and Projective Superspace
S. M. Kuzenko, U. Lindstrom, M. Rocek +1
This paper presents a projective superspace formulation for 4D N = 2 matter-coupled supergravity. We first describe a variant superspace realization for the N = 2 Weyl multiplet. I…
Instability in cosmological topologically massive gravity at the chiral point
Daniel Grumiller, Niklas Johansson
We consider cosmological topologically massive gravity at the chiral point with positive sign of the Einstein-Hilbert term. We demonstrate the presence of a negative energy bulk mo…
Chain inflation revisited
Diego Chialva, Ulf H. Danielsson
This paper represents an in-depth treatment of the chain inflation scenario. We fully determine the evolution of the universe in the model, the necessary conditions in order to hav…
Non-Abelian Supercurrents and de Sitter Ground State in Electroweak Theory
M. N. Chernodub, Ludvig Faddeev, Antti J. Niemi
We show that gauge symmetry breaking in the Weinberg-Salam model can be implemented by a mere change of variables and without any explicit gauge fixing. The change of variables ent…
Topological Sigma Models with H-Flux
C. M. Hull, U. Lindstrom, L. Melo dos Santos +2
We investigate the topological theory obtained by twisting the N=(2,2) supersymmetric nonlinear sigma model with target a bihermitian space with torsion. For the special case in wh…
Quantum Giant Magnons
K. Zarembo
The giant magnons are classical solitons of the O(N) sigma-model, which play an important role in the AdS/CFT correspondence. We study quantum giant magnons first at large N and th…
Dimensional Regularization and Dimensional Reduction in the Light Cone
Jian Qiu
We calculate all the 2 to 2 scattering process in Yang-Mills theory in the Light Cone gauge, with the dimensional regulator as the UV regulator. The IR is regulated with a cutoff i…
Finite size effects for giant magnons on physical strings
J. A. Minahan, O. Ohlsson Sax
Using finite gap methods, we find the leading order finite size corrections for an arbitrary number of giant magnons on physical strings, where the sum of the momenta is a multiple…