Zi Yang Meng

The University of Hong Kong

Title: Detective Mr. Dragon on the Polynomial Sign Problem in Twisted Bilayer Graphene

Abstract: I will review the model design and computation solutions of the quantum moire materials, and demonstrate how can one solve these interesting systems in which both long-range Coulomb interaction and the flat-band quantum metric constructively give rise to the rich phase diagram. In particular, I will also tell the story about how detective Mr. Dragon discover the polynomial sign-problem in the quantum Monte Carlo simulations of the moire lattice models.