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Consider the problem of computing the entanglement entropy of two CFTs in the thermofield double state on identical finite intervals in 1+1 dimensions. The Euclidean path integral is then equivalent to computing the 2-point twist correlator on a torus. Given a central charge ##c##, does anyone know of a reference that computes this in the ##c\rightarrow \infty## limit without using holography i.e. without going to the thermal AdS saddle point (I think?) and using Ryu-Takayanagi?