Programme

O.43 -- Oral, VCTP-51

Date: Thursday, 6 August 2026

Time: 16:00 - 16:20

Gravitational-waves from Oscillons in a Generalized Exponential Plateau Potential

Peter Lott, Tuan Q. Do

Phenikaa Institute for Advanced Study

We study oscillon formation and gravitational wave production in a generalized exponential plateau inflationary potential. Using Floquet analysis, we identify parametric instability bands consistent with oscillon formation, and solve numerically for the oscillon profile, finding quasi-breather solutions with lifetimes τₒₛc · m ≈ 10³–6 × 10⁴. Applying the poltergeist mechanism, we compute the induced gravitational wave spectrum and find a peak at fₚₑₐₖ ≈ 10¹¹ Hz with amplitude ΩGW,0 h² ≈ 10⁻⁹–10⁻⁸ for the benchmark parameter βpot = 5 × 10⁻⁶, safely below the BBN bound. For βpot = 5 × 10⁻⁵, the signal exceeds the BBN bound for all considered oscillon energy fractions, constraining the parameter space of the model. The signal falls in the GHz regime, potentially accessible to future resonant cavity experiments.

Presenter: Lott Tell Peter