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- W2125006273 abstract "There has been a proposal that infrared quantum effects of massless interacting field theories in de-Sitter space may provide time-dependent screening of the cosmological constant. As a concrete model of the proposal, we study the three loop corrections to the energy-momentum tensor of massless $lambda phi^4$ theory in the background of classical Liouville gravity in $D=2$ dimensional de-Sitter space. We find that the cosmological constant is screened in sharp contrast to the massless $lambda phi^4$ theory in $D=4$ dimensions due to the sign difference between the cosmological constant of the Liouville gravity and that of the Einstein gravity. To argue for the robustness of our prediction, we introduce the concept of time-dependent infrared counter-terms and examine if they recover the de-Sitter invariance in the $lambda phi^4$ theory in comparison with the Sine-Gordon model where it was possible." @default.
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- W2125006273 date "2015-05-19" @default.
- W2125006273 modified "2023-09-24" @default.
- W2125006273 title "Is the cosmological constant screened in Liouville gravity with matter?" @default.
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- W2125006273 doi "https://doi.org/10.1093/ptep/ptv062" @default.
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