Luis Apolo , Wei Cui , Kimyeong Lee , Hao Y. Zhang

Dongsheng Ge

Tuesday, October 20, 2026 2:00 PM - 3:00 PM

A3-4-301

Zoom 537 192 5549 (BIMSA)

In this talk, I will talk about a recent study on the linearized scattering of dilaton-graviton waves from a thin brane in three-dimensional spacetime. Holographically, the setup models scattering from an interface in a family of strongly coupled theories related to dimensional reductions of higher-dimensional AdS_{d+2} gravity. Unlike the pure AdS_3 case, for d > 1 the physical bulk mode allows incident radiation to be redistributed into reflected, transmitted, and evanescent components. I will focus on the d = 2 background, where we obtain a controlled solution in which the interface acts like a rough translucent window, producing diffuse angular scattering and absorption into surface modes. From the dual perspective, the scattering process is suggestive of dissipative flow toward the infrared. This talk is based on a recent work 2605.14580 with C. Herzog.

Dr. Dongsheng Ge received his PhD degree at Ecole Normale Superieur in Paris in 2020. After that, he has performed a postdoc at the University of Warsaw in Poland and then at the University of Osaka in Japan. Currently he is a postdoc fellow at YMSC in Tsinghua University. His interests include holographic duality, defects in quantum field theories and their relation to quantum information.