报告题目：Stripe phase in 2D Hubbard model

报  告  人：Mingpu Qin, College of William & Mary

报告时间：2018-01-12, 10:00

报告地点：理科楼C302报告厅

报告摘要：Recent experiments show spin and charge order and their fluctuation might be the key to understand high- temperature superconductivity. In this talk, I will show our recent work on the stripe phase in the 2D Hubbard model at 1/8 doping with numerical methods. I will first give a brief introduction of the auxiliary field Quantum Monte Carlo (AFQMC) method and the minus sign problem. Then I will discuss the constrained path Monte Carlo (CPMC) method which was designed to attack the minus sign problem. I will present our recent development, i.e., the self-consistent CPMC method. With this method we establish the existence of stripe phase in the ground state of 1/8 doped Hubbard model. I will conclude by addressing the remaining problems in the study of doped 2D Hubbard model.