Deformations of cosmological solutions of D=11 supergravity

Nihat Sadik Deger and Ali Kaya
Phys. Rev. D 84, 046005 – Published 9 August 2011

Abstract

We study Lunin-Maldacena deformations of cosmological backgrounds of D=11 supergravity which gives an easy way to generate solutions with nonzero 4-form flux starting from solutions of pure Einstein equations which possess at least three U(1) isometries. We illustrate this on the vacuum S-brane solution from which the usual SM2-brane solution is obtained. Applying the method again, one either gets the recently found S-brane system where a contribution of the Chern-Simons term to field equations is nonzero or the SM2SM2(0) intersection, depending on which U(1) directions are used during the process. Repeated usage of the procedure gives rise to configurations with several overlapping S-branes, some of which are new. We also employ this method to construct two more new solutions and make comments about accelerating cosmologies that follow from such deformed solutions after compactification to (1+3) dimensions.

  • Received 6 June 2011

DOI:https://doi.org/10.1103/PhysRevD.84.046005

© 2011 American Physical Society

Authors & Affiliations

Nihat Sadik Deger1,* and Ali Kaya2,†

  • 1Department of Mathematics, Bogazici University, Bebek, 34342, Istanbul-Turkey
  • 2Department of Physics, Bogazici University, Bebek, 34342, Istanbul-Turkey

  • *sadik.deger@boun.edu.tr
  • ali.kaya@boun.edu.tr

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Issue

Vol. 84, Iss. 4 — 15 August 2011

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