Year: 2011
Type: article
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 $\mathrm{SM}2\ensuremath{\perp}\mathrm{SM}2(0)$ 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.
Authors: Nihat Sadik Deger, Ali Kaya
Institution: Boğaziçi University
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2020930638