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- W4387615023 abstract "We study the nonlinear dynamics of axion inflation, capturing for the first time the inhomogeneity and full dynamical range during strong backreaction, till the end of inflation. Accounting for inhomogeneous effects leads to a number of new relevant results, compared to spatially homogeneous studies: (i) the number of extra efoldings beyond slow-roll inflation increases very rapidly with the coupling, (ii) oscillations of the inflaton velocity are attenuated, (iii) the tachyonic gauge field helicity spectrum is smoothed out (i.e., the spectral oscillatory features disappear), broadened, and shifted to smaller scales, and (iv) the nontachyonic helicity is excited, reducing the chiral asymmetry, now scale dependent. Our results are expected to impact strongly on the phenomenology and observability of axion inflation, including gravitational wave generation and primordial black hole production." @default.
- W4387615023 created "2023-10-14" @default.
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- W4387615023 date "2023-10-13" @default.
- W4387615023 modified "2023-10-15" @default.
- W4387615023 title "Strong Backreaction Regime in Axion Inflation" @default.
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- W4387615023 doi "https://doi.org/10.1103/physrevlett.131.151003" @default.
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