We investigate the embedding of brane inflation into stable compactifications of string theory. At first sight a warped compactification geometry seems to produce a naturally flat inflaton potential,… (More)

We present a new version of our racetrack inflation scenario which, unlike our original proposal, is based on an explicit compactification of type IIB string theory: the CalabiYau manifold… (More)

We introduce the general N = 1 gauge theory superconformally coupled to supergravity. The theory has local SU(2, 2|1) symmetry and no dimensional parameters. The superconformal origin of the… (More)

We consider preheating in the theory 14λφ 4 + 12g φχ, where the classical oscillating inflaton field φ(t) decays into χ-particles and φ-particles. The parametric resonance which leads to particle… (More)

According to the inflationary universe scenario the universe in the very early stages of its evolution was exponentially expanding in the unstable vacuum-like state. At the end of the exponential… (More)

light years away from each other, so the universe would be practically structureless. We argue that the Hartle-Hawking wave function does not describe the probability of creation of the universe. If… (More)

We study quantum effects on moduli dynamics arising from the production of particles which are light at special points in moduli space. The resulting forces trap the moduli at these points, which… (More)

We argue that in the simplest version of the KKLT model, the maximal value of the Hubble constant during inflation cannot exceed the present value of the gravitino mass, H < ∼ m3/2. This may have… (More)

We reconsider the old problem of the dynamics of spontaneous symmetry breaking (SSB) using 3D lattice simulations. We develop a theory of tachyonic preheating, which occurs due to the spinodal… (More)