Core Research Area D: Differential geometry and supersymmetry
Leading Researchers
For many years, there has been a fruitful interplay between supersymmetry, string theory and differential geometry [C]. In this Core Research Area (CRA) we continue to explore the the geometry of deformation spaces of geometrical structures related to the scalar field spaces of supergravity and string theory. Of particular interest are four-dimensional N = 2 supergravities whose scalar field space locally is a product of a special Kähler and a quaternionic Kähler manifold. The special Kähler manifold arising in the low energy effective action of string theories is reasonably well understood, while comparatively little is known about the quaternionic Kähler component as it generically receives perturbative and non-perturbative quantum corrections. It arises in the hypermultiplet sector of N=2 type II and heterotic compactification and thus is related to properties of K3 and/or Calabi-Yau threefolds.
The following projects are current and future topics in the CRA:
- Study of the hypermultiplet metric in string compactifications arising from Calabi-Yau manifolds with vanishing Euler number. Building on earlier work [CLST] [DLMST] [HLS] [LST10] it was shown in [KMT] that they also admit a non-integrable SU(2)-structure corresponding to a phase of spontaneously broken N = 4 -> N = 2 supergravity which in turn constrains the possible quantum corrections.
- Extending the study of supersymmetric AdS_4 backgrounds, their moduli spaces and their holographically dual superconformal field theory along the lines of [DLMTW] [LST12] [LT] to other dimensions and to consistent truncations of 10/11-dimensional supergravity of the form AdS_d x Sasaki-Einstein spaces.
- Dimensional reduction of supergravity theories and perturbative quantum corrections are methods inspired by string theory which, based on research in our group [CHM] [CDL] [CNS] [D], can be effectively used to construct many new complete quaternionic Kähler manifolds of negative scalar curvature. We are systematically studying the geometric properties of these constructions.
- It would be
nice to have a mathematical description of non-perturbative
quantum corrections to quaternionic Kähler metrics, such as
the metric on the hypermultiplet sector of type II string theory
compactified on a Calabi-Yau three-fold.
In particular, it is not known in which
situations non-perturbative corrections lead to complete metrics.
Perturbative corrections of the hypermultiplet moduli space
can be described using a one-parameter
deformation of a c-map
metric induced by the HK/QK-correspondence
[APP]
[ACM]
[ACDM].
The method can be also applied in the case of other interesting moduli
spaces such as the Hitchin system.
References
[ACM] D.V. Alekseevsky, V. Cortés and T. Mohaupt, Conification of Kähler and hyper-Kähler manifolds, Commun. Math. Phys. 324 (2013) 637-655. arxiv:1205.2964[math.DG].
[APP] S. Alexandrov, D. Persson and B. Pioline, Wall-crossing, Rogers dilogarithm, and the QK/HK correspondence, JHEP 1112 (2011) 027. arXiv:1110.0466 [hep-th].
[C] V. Cortés (ed.), Handbook of pseudo-Riemannian geometry and supersymmetry, IRMA Lectures in Mathematics and Theoretical Physics 16 (2010), 964 pages.
[CDL] V. Cortés, M. Dyckmanns and D. Lindemann, Classification of complete projective special real surfaces, Proc. London Math. Soc. 109 (2014), no. 2, 353-381. arXiv:1302.4570[math.DG].
[CHM] V.Cortés,X.Han and T.Mohaupt, Completeness in supergravity constructions , Comm. Math. Phys. 311 (2012) 191-213. arXiv:1101.5103[hep-th].
[CLST] V. Cortés, J. Louis, P. Smyth and H. Triendl, On certain Kähler quotients of quaternionic Kähler manifolds, Commun. Math. Phys. 317 (2013), no. 3, 787-816. [arXiv:1111.0679 [math.DG]].
[CNS] V. Cortés, M. Nardmann and S. Suhr, Completeness of hyperbolic centroaffine hypersurfaces, Comm. Anal. Geom. (accepted March 4, 2015), arXiv:1407.3251[math.DG].
[DLMST] T. Danckaert, J. Louis, D. Martinez-Pedrera, B. Spanjaard and H. Triendl, The N = 4 effective action of type IIA supergravity compactified on SU(2)- structure manifolds, JHEP 1108 (2011) 024. arXiv:1104.5174 [hep-th].
[DLMTW] S. de Alwis, J. Louis, L. McAllister, H. Triendl and A. Westphal, Moduli spaces in AdS4 supergravity, JHEP 1405 (2014) 102. arXiv:1312.5659 [hep-th].
[D] M. Dyckmanns, The hyper-Kähler/quaternionic Kähler correspondence and the geometry of the c-map, PhD thesis, University of Hamburg, 2015.
[HLS] C. Horst, J. Louis and P. Smyth, Electrically gauged N=4 supergravities in D=4 with N=2 vacua, JHEP 1303(2013) 144. arXiv:1212.4707 [hep-th].
[KMT] A. K. Kashani-Poor, R. Minasian and H. Triendl, Enhanced supersymmetry from vanishing Euler number, JHEP 1304 (2013) 058. arXiv:1301.5031 [hep-th].
[LST12] J. Louis, P. Smyth and H. Triendl, Supersymmetric Vacua in N=2 Supergravity, JHEP 1208 (2012) 039. arXiv:1204.3893 [hep-th].
[LST10] J. Louis, P. Smyth and H. Triendl, Spontaneous N=2 to N=1 Supersymmetry Breaking in Supergravity and Type II String Theory, JHEP 1002 (2010) 103. arXiv:0911.5077 [hep-th].
[LSV] J. Louis, M. Schasny and R. Valandro, Effective Action of Heterotic Compactification on K3 with Nontrivial Gauge Bundles, JHEP 1204 (2012) 028. arXiv:1112.5106 [hep-th].
[LT] J. Louis and H. Triendl, Maximally Supersymmetric AdS4 Vacua in N=4 Supergravity, JHEP 1410 (2014) 7. arXiv:1406.3363 [hep-th].