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- W3105458529 abstract "Combining the stochastic and $$delta N$$ formalisms, we derive non-perturbative analytical expressions for all correlation functions of scalar perturbations in single-field, slow-roll inflation. The standard, classical formulas are recovered as saddle-point limits of the full results. This yields a classicality criterion that shows that stochastic effects are small only if the potential is sub-Planckian and not too flat. The saddle-point approximation also provides an expansion scheme for calculating stochastic corrections to observable quantities perturbatively in this regime. In the opposite regime, we show that a strong suppression in the power spectrum is generically obtained, and we comment on the physical implications of this effect." @default.
- W3105458529 created "2020-11-23" @default.
- W3105458529 creator A5071413114 @default.
- W3105458529 creator A5076550631 @default.
- W3105458529 date "2015-09-01" @default.
- W3105458529 modified "2023-09-29" @default.
- W3105458529 title "Correlation functions in stochastic inflation" @default.
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- W3105458529 doi "https://doi.org/10.1140/epjc/s10052-015-3643-y" @default.
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