Replica R\'enyi Wormholes and Generalised Modular Entropy in JT Gravity
Replica R\'enyi Wormholes and Generalised Modular Entropy in JT Gravity
We consider the problem of computing semi-classical R\'enyi entropies of CFT on AdS$_2$ backgrounds in JT gravity with nongravitating baths, for general replica number $n$. Away from the $n\to 1$ limit, the backreaction of the CFT twist fields on the geometry is nontrivial. For one twist field insertion and general …