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Bertan, Igor; Sachs, Ivo (2018): Loops in Anti-de Sitter Space. In: Physical Review Letters, Vol. 121, No. 10, 101601
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Abstract

We obtain analytic results for the four-point amplitude, at one loop, of an interacting scalar field theory in four-dimensional, Euclidean anti-de Sitter space without exerting any conformal field theory knowledge. For the two-point function, we provide analytic expressions up to two loops. In addition, we argue that the critical exponents of correlation functions near the conformal boundary of anti-de Sitter space provide the necessary data for the renormalization conditions, thus replacing the usual on-shell condition.