General double monodromy inflation

We revisit the roller-coaster cosmology based on multiple stages of monodromy inflation. Working within framework effective flux field theory, we include full range strong coupling corrections to inflaton sector. find that flattened potentials $V\ensuremath{\sim}{\ensuremath{\phi}}^{p}+\ensuremath{\cdots}$ with $p\ensuremath{\lesssim}1/2$, limited $N\ensuremath{\lesssim}25\ensuremath{-}40$ $e$-folds in first stage inflation, continue fit cosmic microwave background. They yield $0.96\ensuremath{\lesssim}{n}_{s}\ensuremath{\lesssim}0.97$ and produce relic gravity waves $0.006\ensuremath{\lesssim}r\ensuremath{\lesssim}0.035$, agreement most recent bounds from BICEP/Keck. The nonlinear derivative generated by dynamics theory (EFT) also lead equilateral non-Gaussianity ${f}_{\mathrm{NL}}^{\mathrm{eq}}\ensuremath{\simeq}\mathcal{O}(1)\ensuremath{-}\mathcal{O}(10)$, close current observational bounds. Finally, multistage roller coaster, an inflaton--hidden sector $U(1)$ can a tachyonic chiral vector background, which converts rapidly into tensors during short interruption matter domination. produced stochastic are chiral, so they may be clearly identifiable wave instruments like LISA, Big Bang Observer, Einstein Telescope, NANOgrav, or SKA, depending precise model realization. point out attempts resolve ${H}_{0}$ tension using early dark energy generically raise ${n}_{s}$. This might significantly alter impact BICEP/Keck data models