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@article{Cable:2021:10.1103/PhysRevD.104.103511,
author = {Cable, A and Rajantie, A},
doi = {10.1103/PhysRevD.104.103511},
journal = {Physical Review D: Particles, Fields, Gravitation and Cosmology},
title = {Free scalar correlators in de Sitter space via the stochastic approach beyond the slow-roll approximation},
url = {http://dx.doi.org/10.1103/PhysRevD.104.103511},
volume = {104},
year = {2021}
}

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TY  - JOUR
AB  - The stochastic approach to calculating scalar correlation functions in de Sitter spacetime is extended beyond the overdamped “slow-roll” approximation. We show that with the correct noise term, it reproduces the exact asymptotic long-distance behavior of field correlators in free field theory, thereby demonstrating the viability of the technique. However, we also show that the naïve way of calculating the noise term by introducing a cutoff at the horizon does not give the correct answer unless the cutoff is chosen specifically to give the required result. We discuss the implications of this for interacting theories.
AU  - Cable,A
AU  - Rajantie,A
DO  - 10.1103/PhysRevD.104.103511
PY  - 2021///
SN  - 1550-2368
TI  - Free scalar correlators in de Sitter space via the stochastic approach beyond the slow-roll approximation
T2  - Physical Review D: Particles, Fields, Gravitation and Cosmology
UR  - http://dx.doi.org/10.1103/PhysRevD.104.103511
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000720139800010&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://journals.aps.org/prd/abstract/10.1103/PhysRevD.104.103511
UR  - http://hdl.handle.net/10044/1/96391
VL  - 104
ER  -

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