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Half BPS states in AdS_5 x Y^{p,q}
Edi Gava, Kumar S. Narain, Giuseppe Milanesi +1
We study a class of solutions of IIB Supergravity which are asymptotically AdS_5 x Y^{p,q}. They have an R x SO(4) x SU(2) x U(1) isometry and preserve half of the 8 supercharges o…
BPS Solutions in AdS/CFT
E. Gava, G. Milanesi, K. S. Narain +1
We study a class of exact supersymmetric solutions of type IIB Supergravity. They have an SO(4) x SU(2) x U(1) isometry and preserve generically 4 of the 32 supersymmetries of the…
Singularities and closed time-like curves in type IIB 1/2 BPS geometries
Giuseppe Milanesi, Martin O'Loughlin
We study in detail the moduli space of solutions discovered in LLM relaxing the constraint that guarantees the absence of singularities. The solutions fall into three classes, non-…
Two and three loop alpha' corrections to T-duality: Kasner and Schwarzschild
Ghasem Exirifard, Martin O'Loughlin
Two and three loop alpha' corrections are calculated for Kasner and Schwarzschild metrics, and their T-duals, in the bosonic string theory. These metrics are used to obtain the two…
The Universality of Penrose Limits near Space-Time Singularities
Matthias Blau, Monica Borunda, Martin O'Loughlin +1
We prove that Penrose limits of metrics with arbitrary singularities of power-law type show a universal leading u^{-2}-behaviour near the singularity provided that the dominant ene…
Penrose Limits and Spacetime Singularities
Matthias Blau, Monica Borunda, Martin O'Loughlin +1
We give a covariant characterisation of the Penrose plane wave limit: the plane wave profile matrix is the restriction of the null geodesic deviation matrix (curvature tenso…