22 papers
Moduli Entrapment with Primordial Black Holes
Nemanja Kaloper, Joachim Rahmfeld, Lorenzo Sorbo
We argue that primordial black holes in the early universe can provide an efficient resolution of the Brustein-Steinhardt moduli overshoot problem in string cosmology. When the uni…
Four Dimensional Conformal Supergravity From AdS Space
Vijay Balasubramanian, Eric Gimon, Djordje Minic +1
Exploring the role of conformal theories of gravity in string theory, we show that the minimal (N=2) gauged supergravities in five dimensions induce the multiplets and transformati…
BRST Quantization of a Particle in AdS_5
Piet Claus, Renata Kallosh, J. Rahmfeld
We perform the quantization of a massive particle propagating on AdS_5. We use the twistor formulation in which the action can be brought into a quadratic form. We construct the BR…
A Simple Particle Action from a Twistor Parametrization of AdS_5
Piet Claus, J. Rahmfeld, Yonatan Zunger
The SO(4,2) isometries of AdS_5 are realized non-linearly on its horospherical coordinates (x^m,ρ). On the other hand, Penrose twistors have long been known to linearly realize the…
Supertwistors as Quarks of SU(2,2|4)
Piet Claus, Murat Gunaydin, Renata Kallosh +2
The GS superstring on AdS_5 x S^5 has a nonlinearly realized, spontaneously broken SU(2,2|4) symmetry. Here we introduce a two-dimensional model in which the unbroken SU(2,2|4) sym…
The GS String Action on AdS(3)xS(3) with Ramond-Ramond Charge
J. Rahmfeld, A. Rajaraman
We derive the classical kappa-symmetric Type IIB string action on AdS(3) x S(3) by employing the SU(1,1|2)^2 algebra. We then gauge fix kappa-symmetry in the background adapted Kil…