Results 1 to 10 of about 1,088 (47)

A sigma model field theoretic realization of Hitchin's generalized complex geometry

Journal of High Energy Physics, 2004
We present a sigma model field theoretic realization of Hitchin's generalized complex geometry, which recently has been shown to be relevant in compactifications of superstring theory with fluxes.
A. Kapustin, C. Jeschek, E. Witten, I. Vaisman, I.A. Batalin, I.A. Batalin, L. Baulieu, M. Grana, M. Gualtieri, M. Zabzine, N. Hitchin, O. Ben-Bassat, Roberto Zucchini, S. Chiantese, S. Fidanza, S. Kachru, T. Courant, T. Courant, U. Lindström   +18 more
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Gravity, strings, modular and quasimodular forms [PDF]

, 2012
Modular and quasimodular forms have played an important role in gravity and string theory. Eisenstein series have appeared systematically in the determination of spectrums and partition functions, in the description of non-perturbative effects, in higher-
Petropoulos, P. Marios, Vanhove, Pierre
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Gauged (2,2) Sigma Models and Generalized Kahler Geometry [PDF]

, 2006
We gauge the (2,2) supersymmetric non-linear sigma model whose target space has bihermitian structure (g, B, J_{\pm}) with noncommuting complex structures.
A. Bredthauer, A. Sevrin, Diana Vaman, H. Bursztyn, Leopoldo A. Pando Zayas, M. Crainic, M. Gualtieri, S. Hu, S. Hu, S.J. Gates Jr., U. Lindström, U. Lindström, U. Lindström, W. Merrell, Willie Merrell, Y. Lin, Y. Lin   +16 more
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Bubbles on Manifolds with a U(1) Isometry [PDF]

, 2007
We investigate the construction of five-dimensional, three-charge supergravity solutions that only have a rotational U(1) isometry. We show that such solutions can be obtained as warped compactifications with a singular ambi-polar hyper-Kahler base space
A. Saxena, B. Bates, D. Gaiotto, F. Denef, F. Denef, H. Elvang, I. Bena, I. Bena, I. Bena, I. Bena, I. Bena, I. Bena, I.R. Klebanov, Iosif Bena, J. Ford, J.B. Gutowski, J.P. Gauntlett, L. Grant, M.C.N. Cheng, Nicholas P Warner, Nikolay Bobev, P. Berglund, S.D. Mathur, V. Balasubramanian, V.S. Rychkov   +24 more
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Selfdual 4-Manifolds, Projective Surfaces, and the Dunajski-West Construction [PDF]

, 2014
I present a construction of real or complex selfdual conformal 4-manifolds (of signature (2,2) in the real case) from a natural gauge field equation on a real or complex projective surface, the gauge group being the group of diffeomorphisms of a real or ...
Calderbank, David M. J.
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Quantum Corrections in String Compactifications on SU(3) Structure Geometries [PDF]

, 2014
We investigate quantum corrections to the classical four-dimensional low-energy effective action of type II string theory compactified on SU(3) structure geometries.
Grana, Mariana, Louis, Jan, Theis, Ulrich, Waldram, Daniel   +3 more
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On the real homotopy type of generalized complex nilmanifolds [PDF]

, 2019
We prove that for any $n\geq 4$ there are infinitely many real homotopy types of $2n$-dimensional nilmanifolds admitting generalized complex structures of every type $k$, for $0 \leq k \leq n$. This is in deep contrast to the $6$-dimensional case.Comment:
Latorre, Adela, Ugarte, Luis, Villacampa, Raquel   +2 more
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Hitchin Functionals in N=2 Supergravity [PDF]

, 2005
We consider type II string theory in space-time backgrounds which admit eight supercharges and can be characterized by the existence of an SU(3) x SU(3) structure.
Grana, Mariana, Louis, Jan, Waldram, Daniel   +2 more
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Geometry for the accelerating universe [PDF]

, 2006
The Lorentzian spacetime metric is replaced by an area metric which naturally emerges as a generalized geometry in quantum string and gauge theory. Employing the area metric curvature scalar, the gravitational Einstein-Hilbert action is re-interpreted as
C. Rovelli, E. Cartan, Frederic P. Schuller, Mattias N. R. Wohlfarth, N. Hitchin, Raffaele Punzi   +5 more
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E7(7) formulation of N=2 backgrounds

, 2009
In this paper we reformulate N=2 supergravity backgrounds arising in type II string theory in terms of quantities transforming under the U-duality group E7(7). In particular we combine the Ramond--Ramond scalar degrees of freedom together with the O(6,6)
, A. Dabholkar, A. Kleinschmidt, A. Neitzke, A. Sim, A. Swann, A. Tomasiello, A. Van Proeyen, A.A. Gerasimov, A.K. Kashani-Poor, A.O. Barut, Aaron Sim, B. de Wit, B. Wecht, C. Hillmann, C. Jeschek, C.M. Hull, C.M. Hull, D. Cassani, D. Cassani, D. Joyce, D.V. Alekseevskii, Daniel Waldram, E.A. Bergshoeff, H. Samtleben, H. Triendl, J. Shelton, J.A. Wolf, J.P. Gauntlett, Jan Louis, L. Martucci, M. Graña, M. Graña, M. Graña, M. Gualtieri, M. Henneaux, M. Rocek, M. Roček, M. Sato, Mariana Graña, N. Nekrasov, N.J. Hitchin, N.J. Hitchin, P. Kobak, P. Kobak, P. Koerber, P.C. West, P.P. Pacheco, R. Dijkgraaf, S. Chiossi, S. Ferrara, S. Gurrieri, S. Hellerman, S. Kachru, S. Salamon, S. Salamon   +55 more
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