What is sometimes called Rehren duality is a relation between local nets of observables and their restriction to a boundary. It was originally claimed to be a formalization of a toy model of AdS/CFT duality, but in that context field theories are not simply restricted to their boundaries (instead states are mapped to correlators).
Karl-Henning Rehren, QFT lectures on AdS-CFT, hep-th/0411086, in B. Dragovich et al.. Proc. 3rd Summer School in Modern Math. Physics, Zlatibor 2004. Belgrade: Institute of Physics. pp. 95–118.
comments on Jacques Distler’s blog
n-cafe, 2007
wikipedia: AdS/CFT correspondence
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