Paper on dynamical screening published

Our paper titled "Effect of dynamical screening in the Bethe-Salpeter framework: Excitons in crystalline naphthalene" is now published on Phys. Rev. B. I am particularly excited about the publication of this paper, as this is the main project that I've been working on during the last couple of years of my Ph.D. 

https://journals.aps.org/prb/abstract/10.1103/PhysRevB.107.235205

In this work, we demonstrate the theory leading to the formulation of dynamical treatment of the screening in the Bethe-Salpeter equation approach, which is a widely used computational spectroscopy tool to evaluate optical response of materials. We investigate practical approximations to solve the dynamically screened BSE problem. We reported our findings that the dynamical screening effects can be very strong in materials where excitons are strongly bound (e.g. large exciton binding energies), and stands as a guide to understand the different approximations to study this dynamical screening physics in general for many materials.

Science aside, this work was a great effort of my PhD advisor Andre, my previous colleague Josh and myself. It is more or less the end of a long journey even after my graduation. I am grateful!