produced more copiously during inflaton oscillations $^{76}$. 

## D. Particle creation and thermalization 

There are distinct phases of particle creation in this model, here we briefly summarize them below $^{77}$. 

• Tachyonic preheating: 

Right after the end of inflation, the second derivative is negative in the case of inflection point inflation. The inflaton fluctuations with a physical momentum k < ∼ m$_{φ}$ will have a tachyonic instability, see Sec. VI B 3. Moreover V ′′ < 0 only at field values which are ∼ φ$_{0}$ ∼ 10 14 GeV. Tachyonic effects are therefore expected to be negligible since, unlike the case in [725], the homogeneous mode has a VEV which is hierarchically larger than m$_{φ}$ , and oscillates at a frequency ω ∼ m$_{φ}$ . Further note fields which are coupled to the inflaton acquire a very large mass ∼ hφ$_{0}$ from the homogeneous piece which suppresses non-perturbative production of their quanta at large inflaton VEVs. Therefore tachyonic effects, although genuinely present, do not 

