3 papers
gr-qc2026
Nonlinear Lattice Framework for Inflation: Bridging stochastic inflation and the formalism
Pankaj Saha, Yuichiro Tada, Yuko Urakawa
Understanding when inflationary perturbations become genuinely nonlinear near the horizon crossing requires methods that go beyond both linear perturbation theory and the gradient…
hep-ph2026
Probing baryogenesis with gravitational waves
Yanou Cui, Anish Ghoshal, Pankaj Saha +1
Affleck-Dine (AD) baryogenesis is compelling yet challenging to probe because of the high-energy physics involved. We demonstrate that this mechanism can be generically realized wi…
astro-ph.CO2025
Potential Surge Preheating: enhanced resonance from potential features
Pankaj Saha, Yuko Urakawa
We investigate the effects of local features in the inflationary potential on the preheating dynamics after inflation. We show that a small feature in the potential can enhance the…