Infrared dynamics of the massive ${\varphi }^4$ theory on de Sitter space

E. T. Akhmedov, F. K. Popov, V. M. Slepukhin

We study massive real scalar ${\varphi }^4$ theory in the expanding Poincare patch of de Sitter space. We calculate the leading two-loop infrared contribution to the two-point function in t…