# Generalisations of AdS/CFT with string theory on both sides

From my previous post, I found out from the comments that there are various generalisations of AdS/CFT with different things replacing the CFT on the RHS; such as AdS/CMT, AdS/QCD, and also with the AdS replaced on the LHS, like Kerr/CFT a hydrodynamic dual, etc.

I am thus led to ask, "Is there a generalisation of AdS/CFT with string theories on both sides?"

I can think of at least 1 example of a/n (holographic?) equivalence between a $D$ - dimensional string theory and a $D+1$ - dimensional string theory, T-Duality. E.g. the Type I String Theory and the Type I' String Theory, etc.

n

• Why do you say that T-duality is holographic? – Matthew Aug 23 '13 at 20:10
• @Matthew: It was meant to be a questionmark, i.e. "holographic?", since a side question was whether there any holographic cases of T-duality. – Abhimanyu Pallavi Sudhir Aug 24 '13 at 2:08