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Reheating after inflation occurs due to particle production by the oscillating inflaton field. In this paper we describe the perturbative approach to reheating, and then concentrate on effects beyond… (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 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)

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)

Spontaneous symmetry breaking usually occurs due to the tachyonic (spinodal) instability of a scalar field near the top of its effective potential at φ = 0. Naively, one might expect the field φ to… (More)

We investigate the effects of bosonic trilinear interactions in preheating after chaotic inflation. A trilinear interaction term allows for the complete decay of the massive inflaton particles, which… (More)

We describe a new efficient mechanism of reheating. Immediately after rolling down the rapidly moving inflaton field $\phi$ produces particles $\chi$, which may be either bosons or fermions. This is… (More)

We study 2-field inflation models based on the “large-volume” flux compactification of type IIB string theory. The role of the inflaton is played by a Kähler modulus τ corresponding to a 4-cycle… (More)

- Giovanni Felder, Juan García-Bellido, Patrick Bradley Greene, Lev Kofman, A. H. te Linde, Igor Tkachev
- Physical review letters
- 2001

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)

We consider cosmological consequences of string theory tachyon condensation. We show that it is very difficult to obtain inflation in the simplest versions of this theory. Typically, inflation in… (More)