Abstract
Cosmological -attractors are observationally favored due to the asymptotic flatness of the potential. Since its flatness induces the negative pressure, the coherent oscillation of the inflaton field could fragment into quasistable localized objects called I-balls (or “oscillons”). We investigated the possibility of I-ball formation in models of -attractors. Using the linear analysis and the lattice simulations, we found that the instability sufficiently grows against the cosmic expansion and the inflaton actually fragments into the I-balls for .
- Received 30 October 2017
DOI:https://doi.org/10.1103/PhysRevD.97.083514
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