Journal
PHYSICAL REVIEW D
Volume 104, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.104.L121901
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Funding
- Perimeter Institute for Theoretical Physics
- Government of Canada through the Department of Innovation, Science and Economic Development Canada
- Province of Ontario through the Ministry of Colleges and Universities
- Fonds de la Recherche Scientifique-FNRS [F.4503.20, T. 0022.19]
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By utilizing the functional renormalization group and constraints of T-duality, we have derived cosmological effective actions to all orders in alpha', avoiding truncations of the theory space. Our findings show that higher-derivative alpha' corrections prohibit the existence of de Sitter vacua, supporting the no-de Sitter swampland conjecture in the presence of all-order effects in alpha'.
Higher-derivative corrections to cosmological effective actions in string theory are largely constrained by T-duality, but have been computed hitherto only to the first few orders in the string scale alpha'. The functional renormalization group, in conjunction with the strong constraints imposed by T-duality, allows us to derive cosmological effective actions to all orders in alpha' while avoiding truncations of the theory space. We show that the resulting higher-derivative alpha'-corrections forbid the existence of de Sitter vacua, at least in regimes where string-loop corrections can be neglected. Our findings thus support the no-de Sitter swampland conjecture in the presence of all-order effects in alpha'.
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