Four-Dimensional Null Energy Condition as a Swampland Conjecture

Bernardo, Heliudson, Brahma, Suddhasattwa, Dasgupta, Keshav, Faruk, Mir Mehedi and Tatar, Radu
(2021) Four-Dimensional Null Energy Condition as a Swampland Conjecture. PHYSICAL REVIEW LETTERS, 127 (18). 181301-.

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We analyze four-dimensional Friedmann-Lemaître-Robertson-Walker cosmologies in type IIB, arising from a M-theory dual, and find that the null energy condition (NEC) has to be obeyed by them (except for the negatively curved case) in order for the M-theory action to have a Wilsonian effective description. However, this does not imply that the M-theory metric has to obey the 11D NEC. Thus, we propose a new swampland conjecture-the 4D NEC is a consistency condition for any theory to have a completion within M theory-with an explicit derivation of it for cosmological backgrounds from a top-down perspective. We briefly discuss the cosmological consequences of such a condition derived from M theory.

Item Type: Article
Uncontrolled Keywords: Rare Diseases
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 13 Sep 2022 07:23
Last Modified: 18 Mar 2024 00:14
DOI: 10.1103/PhysRevLett.127.181301
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