Citation

BibTex format

@article{Vicente:2026:10.1103/tkw7-dkq6,
author = {Vicente, García-Consuegra L and Rajantie, A},
doi = {10.1103/tkw7-dkq6},
journal = {Physical Review D},
title = {Scalar effective potentials in de Sitter spacetime},
url = {http://dx.doi.org/10.1103/tkw7-dkq6},
volume = {113},
year = {2026}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - <jats:p>We investigate two different definitions of a scalar field effective potential in quantum field theory in de Sitter spacetime: the standard textbook definition, and the constraint effective potential proposed by O’Raifeartaigh  in 1986. While these definitions are equivalent in Minkowski spacetime, they differ significantly in de Sitter spacetime. We demonstrate this by computing them both explicitly at one-loop order in perturbation theory. It is well known that the perturbative expansion of the standard effective potential fails to converge for light fields. In contrast, the constraint effective potential does not suffer from this infrared problem, and it can therefore be computed using perturbation theory. We discuss the physical interpretation of the two effective potentials. In particular, we provide evidence supporting an earlier conjecture that the constraint effective potential is the correct one to use in the stochastic Starobinsky-Yokoyama theory.</jats:p>
AU  - Vicente,García-Consuegra L
AU  - Rajantie,A
DO  - 10.1103/tkw7-dkq6
PY  - 2026///
SN  - 2470-0010
TI  - Scalar effective potentials in de Sitter spacetime
T2  - Physical Review D
UR  - http://dx.doi.org/10.1103/tkw7-dkq6
UR  - https://doi.org/10.1103/tkw7-dkq6
VL  - 113
ER  -
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