On triviality of $λϕ^4$ quantum field theory in four dimensions

Interacting quantum scalar field theories in $dS_D\times M_d$ spacetime can be reduced to Euclidean field theories in $M_d$ space in the vicinity of $I_+$ infinity of $dS_D$ spacetime. Using this non-perturbative mapping, we analyze the critical behavior of Euclidean $λϕ_4^4$ theory in the symmetric phase and find the asymptotic behavior $β(λ)\sim λ$ of the beta function at strong coupling. Scaling violating contributions to the beta function are also estimated in this regime.

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