2 research outputs found
Supersymmetric Godel-type Universe in four Dimensions
We generalize the classification of all supersymmetric solutions of pure N=2,
D=4 gauged supergravity to the case when external sources are included. It is
shown that the source must be an electrically charged dust. We give a
particular solution to the resulting equations, that describes a Goedel-type
universe preserving one quarter of the supersymmetries.Comment: 6 pages, Latex. v2: references and footnote added. v3: introduction
expanded, minor corrections, references added. Final versio
A deformation of AdS_5 x S^5
We analyse a one parameter family of supersymmetric solutions of type IIB
supergravity that includes AdS_5 x S^5. For small values of the parameter the
solutions are causally well-behaved, but beyond a critical value closed
timelike curves (CTC's) appear. The solutions are holographically dual to N=4
supersymmetric Yang-Mills theory on a non-conformally flat background with
non-vanishing R-currents. We compute the holographic energy-momentum tensor for
the spacetime and show that it remains finite even when the CTC's appear. The
solutions, as well as the uplift of some recently discovered AdS_5 black hole
solutions, are shown to preserve precisely two supersymmetries.Comment: 16 pages, v2: typos corrected and references adde