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AdS/CFT, short for Anti-de Sitter/Conformal Field Theory, is a theoretical framework in physics that posits a profound correspondence between certain gravitational theories in higher-dimensional Anti-de Sitter (AdS) space and quantum field theories (QFTs) defined on the boundary of AdS, typically conformal field theories (CFTs). In essence, this framework suggests that the dynamics of gravity in AdS space can be understood by studying the behavior of quantum fields on the boundary.