String Theory seminar - David Meltzer [NOTE UNUSUAL TIME: 15:00] Seminar

Abstract: In this talk, I will present recent work on an AdS/CFT unitarity method for momentum space correlators. This unitarity method will be a direct generalization of the S-matrix unitarity method used to study amplitudes in flat-space. In the first part of the talk, I will review unitarity conditions on QFT four-point functions and their relation to the double-commutator. In the second part of the talk, I will use the QFT unitarity condition to derive the cutting rules for AdS Witten diagrams. In the last part of the talk, I will present new results on momentum space dispersion formulas for CFT correlators. The identities used to derive the cutting rules and dispersion formulas are valid in general theories and can be applied beyond AdS/CFT.