I understand the duality between the two regions of phase space (as Maldacena described it) that are Anti-de Sitter geometry and conformal field theory as an asymptotic grafting on of scale-invariant criticality (CFT) to cylinder-condition negative-cosmological-constant Einstein field equations (AdS) has been a boon to physics and string theories in particular.
I still conceptualize the AdS/CFT correspondence as a geometry. Physics has activity. It has, if you will, computation, a progression of states.
What actually happens with AdS/CFT? In terms of cause-effect? How can I go from geometry to activity?