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arXiv · 1911.02604

How a four-dimensional de Sitter solution remains outside the swampland

Keshav Dasgupta·Maxim Emelin·Mir Mehedi Faruk·Radu Tatar
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Abstract

We argue that, in the presence of time-dependent fluxes and quantum corrections, four-dimensional de Sitter solutions should appear in the type IIB string landscape and not in the swampland. Our construction considers generic choices of local and non-local quantum terms and satisfies the no-go and the swampland criteria, the latter being recently upgraded using the trans-Planckian cosmic censorship. Interestingly, both time-independent Newton constant and moduli stabilization may be achieved in such backgrounds even in the presence of time-dependent fluxes and internal spaces. However, once the time-dependence is switched off, any four-dimensional solution with de Sitter isometries appears to have no simple effective field theory descriptions and is back in the swampland.

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Keshav Dasgupta, Maxim Emelin, Mir Mehedi Faruk, Radu Tatar. 2019-11-06. How a four-dimensional de Sitter solution remains outside the swampland. https://doi.org/10.1007/jhep07(2021)109

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