Some Results On Relative Entropy in Quantum Field Theory
2020
We prove that the mutual information for vacuum state as defined by Araki is finite for general Dirac Quantum Fields in Minkowski spacetime of any dimension. In the case of two dimensional chiral conformal field theory (CFT) we use our previous results for the free fermions to show that for a large class of chiral CFT the mutual information is finite. We also provide a direct relation between relative entropy and the index of a representation of conformal net.
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