## "Superconformal Mellin Amplitudes in Different Dimensions'

**Speaker:**Xinan Zhou, Stony Brook University

**When:**April 11, 2018 (Wed), 04:00PM to 05:00PM (add to my calendar)

**Location:**PRB 595

*This event is part of the HET Seminar Series. *

Holographic four-point functions are known for their notorious computational difficulties. In the past two decades, only a handful of them have been explicitly calculated using the standard algorithm. In this talk I will introduce modern methods to compute holographic correlators efficiently, which are inspired by the bootstrap philosophy and the on-shell methods of scattering amplitudes in flat space. I will show that by translating the problem into Mellin space many difficulties encountered when applying the traditional method are avoided. I will argue that imposing symmetry constraints and general consistency conditions -- avoiding all details of the complicated effective Lagrangian -- leads to many novel results for holographic four-point functions in AdS5×S5, AdS7×S4, AdS4×S7 and AdS6×_w HS4. I will conclude by outlining some interesting future directions of this program.